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Directory:Fuel Efficiency

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Exhaustive directory includes listings of additives, engine modifications, kits, books, efficient engine technologies.

While people hear rumors that methods exist to increase mileage, and they believe that this is most likely the case, the task of weeding through the many claims and scams is daunting.
This directory is becoming a trusted source where people can come to find just what technology would be best for their particular car and ability to install and budget for installing. Once you have installed a system, feel free to come here to report your results, to either substantiate or contradict the claim, so that the absolute best technologies trickle to the top.

This site is built by you: the experienced researchers, investigators, and consumers who have knowledge to impart on this subject. Our collective wisdom is far greater than any one person who might compile a site on their own. Because you can edit this site, you can help build it into the most reliable and helpful resource on this subject.




  • Model of Efficiency - PBS/Nova has a "Car of the Future" feature addressing the question, Why haven't cars improved more in fuel efficiency over the decades? View the brief 5-part Nova video with Amory Lovins and Rocky Mountains Institutes' new hyper car presentation. (Thanks Wesleybruce)
  • How Many Miles to the Bushel? - The May issue of Popular Mechanics compares fuel costs for various types of fuels. Coast-to-coast drive would be $60 for coal (electricity); $110 for natural gas; $213 for gasoline; $231 for biodiesel; $425 for E85/ethanol; $619 for M85/methanol; $804 for hydrogen. (NYTimes; May 27, 2006)
  • Fuel Efficiency / Movies >
    Ready To Wean Off Oil Yet? DIY Fuel for $1 Per Gallon - If the BP disaster isn't enough to motivate you off oil, then take a peek at the many alternatives in Josh Tickell's documentary "Fuel: Change your Fuel ... Change Your World", which is out on DVD 22 June 10. But if fryer oil waste isn't your vehicles' cup of tea, Tickell also has energy-efficient suggestions. (TreeHugger; June 4, 2010)
  • U.S. can cut oil imports to zero by 2040 - Since vehicles use 70% of oil in the United States and 75% of fuel use is weight-related, the biggest savings would come from making cars lighter, which would reduce oil consumption and make cars safer and more reliable. "Ultralighting" vehicles using carbon composites or ultralight steels is essentially "free" with cost increases for materials offset by gains in efficiency. (Mongabay; Mar. 29, 2007)
  • Top 4 Ways Automakers Can Meet New MPG Standards - New CAFE standards will jump to 35 mpg for all cars and SUVs by 2020, up from 27.5 mpg for cars and 22.5 mpg for trucks. Here are four keys for automakers to bolster their fuel economy: Reduce weight, use diesel engines (30% more efficient than gas), low rolling resistance tires and continuously variable transmissions. (Popular Mechanics; Jun. 21, 2007)


  • The Ultimate Fuel Economy Book - The 2008 edition of this book is a compilation of the hundreds of hours Mike spent learning and experimenting. It is the most comprehensive summary on fuel economy to date for the average person.
  • Beat The Gas Pump - Finally, the First Practical, Complete, Manual of Insider Secrets and Industry Experts Special Strategies to Save Gas and Money at the Pump.
  • Super Gas Saver Secrets - Gasoline pre-heater, heated air intake, homemade fuels, mothballs in gas tank, double ignition coil, coil capacitor assist, water tuneup, solid copper core ignition cables, water injection, deceleration fuel shutoff, electric radiator fan and more.

Mechanical Solutions


See Directory:Lubricants



See Directory:Capacitors

Economical Vehicles

Directory:Fuel Efficiency Vehicles - The most economical vehicles in production today are TDI diesels and hybrid electric vehicles. Other topics include concept cars and high mileage gasoline cars.

Image:SmartCarZap.jpg Image:Clever mini car 95x95.jpg Image:Loremo_balloon_95w.jpg Image:BioDiesel_car_95pxw.jpg Image:Humming_Bird_Water_Injected_Car.jpg

Electric Vehicles

Directory:Electric_Vehicles (Separate page) - The fuel cost for an electric car is one quarter that of a gasoline car. Lithium batteries extend the range and top speed. Choose from several new models or convert a conventional car into an electric car.

Image:E_trans_sol_collage_e_95x95.jpg Image:Tesla Roadster front back 95x95.jpg Image:Subaru_All_Electric_Car.jpg Image:Hybrid_Technologies_Electric_PT_Cruiser.jpg Image:AC_Propulsion_tzero.jpg Image:EV-Global_E-Bike.jpg

Electric Cars

  • Electric Cars - Put solar PV panels on the roof of your garage or carport and "fill up" at home for free.

Electric Trucks

Electric Scooters

  • Directory: Electric Scooters - There is great alternative to city commuting -- electric scooters. The cost to travel 10-20 miles is well below $0.2 as opposed to $2 on city bus (NYC). Scooters require less mass to be moved, and hence can be far more economical.

Solar Vehicles

Hybrid Vehicles

  • Directory: Hybrid Vehicles - Hybrid Vehicles run on a combination of propulsion systems to achieve greater fuel efficiency. Most commercially available hybrids (such as the popular Toyota Prius) are classified as HEVs (Hybrid Electric Vehicles). HEV cars typically use gasoline as the fuel, but they also have an electric motor which can propel the vehicle. Electricity is generated by recovering braking energy as well as directly by the ICE. It is stored in batteries and used by the electric motor to assist the ICE and even to propel the car by itself (primarily at low speeds where the ICE is inefficient).

Hydrogen Vehicles

  • Featured: Fuel Efficiency > Hydroxy >
    Scooter runs on 100% Hydroxy, no gasoline - Grad student, Jake Wall, fitted a scooter with a Bob Boyce like electrolysis unit and was able to run the scooter (in the garage) on just the hydrogen-oxygen mixture, using half the energy input the engine normally requires. (PESN; Jan. 17, 2009)
  • Volkswagen HyMotion fuel cell vehicle - built into Volkswagen's new Tiguan crossover model, uses hydrogen to create electricity, providing power for the car's electric drive motor. It also has a lithium ion battery pack for extra electricity storage, and gets the gasoline equivalent of 42-to-62 miles per gallon. (CNet Reviews; June 12, 2008)


Directory:Engines - new engine designs that are more efficient, more versitile, smaller, etc.

Image:Massive_yet_Tiny_engine_crop_95X95.jpg Image:Starrotor_engine_95x95.jpg Image:Revtec_anim_95w.gif Image:Green_steam_engine_anim_95x95.gif Qtv2-SCAnim2.gif


Directory:Fuel Efficiency Retrofits - A variety of add-on devices and gadgets claim to enhance mileage. Includes high flow air filters, performance spark plugs, electronic tools and gauges, capacitor spark assist, premium ignition systems, vaporizers, lubricants, free flow exhausts.

Image:K&N_FilterCharger.jpg Image:Torco_MPZ_Friction_Reducer.jpg Image:Aero_Turbine_Exhaust.jpg Image:Vortexvalveside 95x95.jpg

  • Fuel Efficiency > Retrofits >
    Jet Stream™ Electric Supercharger - This ebook shows how, for less than $100 USD, and with minimal mechanical skill, you can build and install this Supercharger, capable of up to 24,500 rpm; which will deliver a 5-30% boost in horsepower throughout the entire RPM band, "guaranteed," while also improving mileage 10% or more on most any vehicle. (eSuperchargers; [Dec. 27, 2010])

Spark Plugs

Directory:Spark Plugs - index of spark plug technologies that boost economy, and increase horsepower

Image:Pulstar pulse plug 20kx 95x95.jpg Image:Smartplug_firing.gif Image:Sonic_Spark_Plugs_95x95.jpg Image:Halo_spark_plug_95x95.jpg

SuperHeater Diesel Catalysts

Directory:Fuel Catalysts - index of fuel catalysts for diesel engines that save on fuel amd redce emissions. For trucks, diesel cars, generators, reefer trailers, and

  • http:/


  • Aerocivic and its aesthetically-challenged modifications strikes again! - When Mike Turner designed his Honda Civic into the Aerocivic, the homemade body kit extends the nose and tail of the vehicle in an airfoil shape of sorts and adds hinged wheel skirts around the previously exposed tires. He doubled fuel mileage on the highway. (AutoBlog Green; May 9, 2008)
  • 1959 Opel T-1 - This old car gets 376 MPG using a chain drive and a closed-up rear wheel axle with rock-hard tires. (Seattle PI; Feb. 20, 2008)
  • Japanese "Mileage Maniacs" Hack Prius To Get 116 MPG - Enthusiasts in Japan have hacked their Priuses, and use zen-like driving techniques to get up to 116 miles per gallon. Their techniques involve hacking the cars' computer systems, adding special tires, and going to great lengths to perfect what they call the "pulse and glide" driving method. (TreeHugger; Apr. 9, 2007)


  • Fuel Efficiency >
    110 MPG V-8 Ignored by the DOE - Douglas' technology utilizes variable cylinder displacement in a standard or hybrid automobile engine. To keep it simple, by skipping a firing cycle in a piston every other fire, you effectively cut fuel consumption in half for each cylinder with the skipped cycle. When the power is needed, then the computer senses it and... (PureEnergyBlog; May 29, 2013)


  • Fuel Efficiency > Tires >
    Cambered Tires Can Improve Fuel Economy - While a tire that is angled inwards towards the chassis increases economy, it also increases tire wear and impairs ride quality. A new design minimizes these negative effects. (Green Car Report; August 13, 2010)
  • Fuel Efficiency > Tires >
    Reinventing the wheel -- shapeshifter - The Pumplon tire by a Brizilian inventor can change its shape to that best suited for the conditions of the road. This shape of tire contains green benefits too in the form of reduced travel times to increased fuel efficiency. Probably not as useful in locations with good roads. (Alt Energy News; Dec. 21, 2009)
  • New Tires Made of Oil from Orange Peels - Yokohama is now selling a model made with 80 percent non-petroleum material, substituting orange oil as the primary ingredient to make vulcanized rubber. It also helps consumers save money at the gas pump by improving fuel efficiency via a 20-percent reduction in rolling resistance. (Earth 911; July 9, 2009)


  • Directory:Transmissions - Efficient designs for Continuously Variable Transmissions (CVT) and Infinitely Variable Transmissions (IVT) optimize engine efficiency, resulting in fuel economy improvement and reduced emissions. Hybrid models use electric motors or hydraulics for regenerative braking and energy storage.

Wind Resistance

  • Aerodynamic long tail improves fuel efficiency 15 percent -’s Darin Cosgrove added a tapered tailpiece to his Pontiac Firefly to improve its drag coefficient from 0.34 to 0.23 and its fuel efficiency by 15.1 percent at 90kmh (56mph); with/without measured from multiple bi-directional averaged runs at exactly 90kmh on a straight and level road, with no other traffic. (GizMag; December 29, 2009)
  • Fuel Efficiency > Wind Resistance >
    Europe Testing "Road Trains" to Cut Fuel Use - In the Safe Road Trains for the Environment (SARTRE) system up to 8 vehicles (cars, busses, trucks) would travel as one "train," linked by wireless sensors, cutting fuel use by 20%. The lead "train", driven by a professional, would enable the trailing vehicles' drivers to become "passengers", able to take their hands off the wheel -- and they could come and go as they please . (EcoGeek; Nov. 11, 2009)
  • Boat tail reduces truck fuel consumption by 7.5 percent - European tests have shown that a boat tail – a tapering protrusion mounted on the rear of a truck – leads to fuel savings and reduced emissions by dramatically reducing the drag caused by the lower-pressure effect that occurs in the wake of a vehicle. (GizMag; Nov. 5, 2009)
  • Engineer devises ways to reduce air drag in vehicles and planes - Researchers at Washington University in St. Louis are developing an active flow control (AFC) technology that deploys actuators on the surface of vehicles to modify the air flow in a way that the overall resistance is reduced by 10-15 percent. (PhysOrg; March 16th, 2009)

Yoke Arm

Other Methods

  • Fuel Efficiency >
    High-speed trains pollute 29 percent less than traditional trains - The AVE consumes less due to the intrinsic features of the high speed system, such as its more standardised speed profile and the lower number of stops and curves during the journey. The consumption of auxiliary services (air conditioning, lighting and ventilation) is also reduced in direct proportion to speed. (PhysOrg; December 14, 2010)
  • GM's Spark-less Engine Boosts Fuel Economy By 15% - GM's homogenous charge compression ignition engine (HCCI) is able to improve fuel economy by 15 percent when combined with other advanced technologies. HCCI works by igniting the air and fuel mixture through compression instead of with a spark; and saves fuel by reducing pumping losses, burning fuel faster at lower temperatures and reducing the loss of heat energy. (EcoGeek; May 22, 2009)

Super Fuel Efficient Vehicles

  • Fuel Efficiency > Engines > Super Fuel Efficient Vehicles >
    Next-Gen Mazda2 Will Return 70 MPG, Without An Electric Motor - The new version of the Mazda2 will feature Mazda's next-generation of drivetrain, body and chassis technologies, dubbed SKYACTIV. The new Mazda 2 will come powered by a SKYACTIV-G engine, Mazda's next-generation direct injection gasoline mill that achieves significantly improved fuel efficiency thanks to a high compression ratio of 14.0:1 (the world's highest for a production gasoline engine). (GreenCarReports; Oct. 21, 2010)
  • Fuel Efficiency > Super Fuel Efficient Vehicles >
    Avion car goes border to border on one tank of diesel - In 1984, Craig Henderson and Bill Green built a one-of-a-kind super fuel-efficient car called the Avion. In 1986, it set the Guinness world record for fuel economy by averaging 103.7 mpg (2.27L/100km) while driving from the Mexican to Canadian borders. It is still on the road... and breaking its own records. On August 29th, they drove 1,478 miles (2,379 km) to the Mexican border getting 119.1mpg (1.97L/100km). (GizMag; Sept. 15, 2010)


Underground Tunnel Trains

  • Conspiracy > Underground Bases / Fuel Efficiency >
    LA-NY 10,000 MPH Tunnel Completed, Sequestered? (Article) - Since 1972, the U.S. has been working on a tunneling project using nuclear power, and mag-lev train technology, ostensibly to enable LA-to-NY travel in half an hour, along the Highway 66-30 corridors, with tickets going for $50. Recent booms heard along those stretches suggest the project may be completed, but only for black-budget use, possibly for the deep underground base transportation by the tyrannical elite. (YouTube / TheAlexJonesChannel; April 14, 2012)

Bullet Trains

  • Fuel Efficiency >
    China Building 1,000 KPH Super Train - The latest plan from the People’s Republic calls for a high speed train that will combine the maglev system used in Japan and France with vacuum tubes. In theory, this train will be able to go 1,000 kph, or about 620 mph. That is twice as fast as most high speed trains travel today. It's as fast as a jet. (Gas 2.0; Aug. 6, 2010)

Electric Freight Rail

  • Electric Freight Rail 8X More Efficient than Heavy Trucks - Electrifying railroads and transferring half of the ton-miles of trucks to rail could save 6.3% of US oil consumption. Electric railroads, well-proven in other countries, are cheaper to operate and can carry more freight because they accelerate and brake faster (and can generate electricity while braking, saving energy), and have no delays for refueling. (PESWiki)


  • Fuel Efficiency / EVs > Electric Cars > Cautions >
    Diesels Cleaner Than Electrics Over Lifetime Says One Study - According to a Swiss study, compared to diesel-powered cars that get over 60 mpg, electric vehicles may have a larger environmental impact… especially if the electricity comes from non-renewable sources. Factors in the rare earth elements in the batteries and motors, as well as the power grid requirements. (Gas 2.0; September 2, 2010) (Also GizMag) (Positive spin by SpaceMart)

On-Board Gensets for Electric Vehicles

  • Featured: Fuel Efficiency / Magnet Motors / Electrostatic >
    My Trip to see Lawrence (Larry) Sadler Under Way - Larry is an amazing inventor. I'm uploading videos from my visit as I go along. Stay tuned to this page. See his R&D a magnepulse motor, a Van de Graaff generator for harvesting electrostatic energy; but most importantly his 94-mpg Geo Tracker prototype which is ready to head into commercial development. (PESWiki; December 10, 2014)

Fuel Additives


  • Directory: Acetone As a Fuel Additive - Said to increase mileage 15-35%. Added to gas tank in small proportion improves the fuel's ability to vaporize completely by eliminating the surface tension that causes some particulates to not fully vaporize. Directory page created to compile date.
[Perhaps the most easy-to-prove and accessible fuel-economizing approach to date]


  • Crunk: Fuel improvement with Hexane - "I just did a vapor carburetor test on my automobile through my hexane bubbler system using hexane vapors only no HHO Gas was used or any electronic Manipulation box." (Free Energy Blog; August 15, 2014)

Hydrogen Injection

Directory:Fuel Efficiency Hydrogen Injection - By injecting hydrogen through the air intake, fuel consumption can be reduced and engine performance increased. A list of companies and products that use this approach.

Image:Dieselgasaustralia_95x95.jpg Image:Liberty_Hydrogen_Booster.jpg Image:H-boost_kit_95x95.jpg


  • Directory:Electrorheology (separate page) - Rheology is defined as the science of the deformation and flow of matter. Researchers at Temple University have published a method by which their electrically charged tube is attached to the fuel line of a car's engine near the fuel injector, creating an electric field that thins fuel, or reduces its viscosity, so that smaller droplets are injected into the engine.

Alternative Fuels

Directory:Alternative Fuels - Bio fuels, gas, alcohol, hydrogen, vegetable oil, alternative methods of powering vehicles. Make your own fuel or fill up at bio-diesel or E85 stations listed.

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Directory:Butanol - Butanol is compatible with gasoline. It uses the same air/fuel mixture and has the same energy content. It can be mixed with gasoline in any ratio in unmodified engines. Butanol can be produced at an estimated cost of 85 cents per gallon, and is a direct replacement for gasoline.

Hydrogen Peroxide

Directory:Hydrogen Peroxide as Fuel - Hydrogen Peroxide (H2O2) has been used as rocket propellant, but can also be used to run automobiles. With how well it stores in liquid form, it is perhaps an under-appreciated mechanism for energy storage and fuel. Could possibly find application as a fuel for jet aircraft engines.

Hydrogen from Water

Directory:Hydrogen from Water - Hydrogen can be generated from water by `splitting' it from oxygen. The most well-known process is electrolysis, but other mechanisms exist as well, such as catalyst in the presence of heat (e.g. solar).

Biodiesel from Algae Oil

  • Biodiesel from Algae Oil - Advantages include rapid growth rates, a high per-acre yield, and algae biofuel contains no sulfur, is non-toxic, and is highly biodegradable. Some species of algae are ideally suited to biodiesel production due to their high oil content--in excess of 50%.

Cooling Engine Intake

HP increasing Drag Racing technology used to give gasoline and deisel engines 100+% increase in MPG.



  • Fuel Efficiency >
    Miles-Per-Gallon Is Just Stupid - Author argues that the U.S. should adopt the efficiency gauge of 'gallons per 100 miles' as a more accurate and helpful indicator of what car is the best choice, like they do in Europe, Canada, and elsewhere. (Green Car Reports; March 13, 2009)


  • 50 MPG Plane Wins PAV Prize - The Pipistrel won NASA's Personal Air Vehicle (PAV) X-Prize like contest, achieving 50 MPG. The plane is extremely light weight, so it becomes more fuel efficient as it flies and burns fuel, getting lighter. The plane's simple controls and ease of operation also helped it take home the prize. It costs about $70,000. (EcoGeek; Aug. 15, 2007)
  • World fuel consumption champion gets 10,517 mpg - Microjoule won the 31st annual Shell Eco-marathon UK with 10,517 mpg. The best Alternative vehicle was ESSTIN (solar), at 10,197 mpg. For the second year, schools gathered from all over the UK to compete in the ‘Schools Initiative’, with children as young as 11 pushing the boundaries of vehicle design. (GizMag; Jul. 16, 2007) How much fuel mileage does the MicroJoule really get? The next Eco-Marathon will find out. (Inhabitat; March 18, 2008)
  • Challenge X 2007 Competition Winner - Mississippi State University won the third annual Challenge X with a hybrid electric 1.9-liter GM direct injection turbodiesel engine fueled by B20 biodiesel, a 330V NiMH battery pack from Johnson Controls, and a 45 kW Ballard Integrated Power Transaxle. The vehicle achieved a 48% increase in fuel economy over the production 2005 Chevrolet Equinox that served as the basis for all the entries. (Green Car Congress; Jun. 7, 2007)
  • Cal Poly wins Shell Eco-Marathon with 1,902.7 mpg! - The team from Cal Poly in San Luis Obispo, California, won the 2007 Shell Eco-Marathon. The team's vehicle recorded a best of 1,902.7 mpg to win the Grand Prize and the first in the Combustion Engine Group. (AutoblogGreen; Apr. 15, 2007)
  • Ethanol Car Beats Fuel Cells to Win European Eco-marathon - French High School students achieved the best fuel efficiency at the European Shell Eco-marathon, with an energy consumption equivalent to traveling 2,885 kilometers on a single liter of gasoline (6,788 mpg). (Environment News Service; May 22, 2006)
  • Shell Eco-Marathon - Anual race features the most efficient designs worldwide. May 22-24, 2008.
  • Car achieves almost 10,000 miles per gallon - A car driven by a 10-year-old and built at a French school has set a world record for fuel efficiency, managing the equivalent of 9,845 miles per gallon while driving for 10 miles around Silverstone race track in the UK. More than 100 teams competed in the Shell Eco-Marathon to see how far they can travel on a minuscule amount of fuel. (BBC News; July 16, 1999) (Thanks Ronald Gillen)

Automotive X Prize

  • Automotive X PRIZE - The Automotive X PRIZE (AXP) announced a list of teams competing to build and bring to market 100 MPG or higher fuel economy vehicles that people want to buy. Those that qualify will race their vehicles in rigorous crosscountry stages that combine speed, distance, urban driving and overall performance.



  • Advanced Powertrain Research Facility - The principal U.S. Department of Energy (DOE) facility for assessing advanced and hybrid electric vehicle (HEV) technologies for the Vehicle Technologies Program.


Directory:Fuel Efficiency Explanations - Looking at how and why fuel technologies work.



See also Directory:U.S. Government and Energy

  • Obama to Automakers: Make Greener American Cars or Go Under - One of the reasons cited by Obama for denying Chrysler and GM further bailout funds, was that neither planned on going green enough, and that in order to be 'viable' they need to put more effort and resources towards developing and selling fuel efficient vehicles. (TreeHugger; March 30, 2009)

Clearing of Conspiracy

  • Featured: Conspiracy / Fuel Efficiency / US Govt and Energy >
    Debunked: High-Mileage Vehicles Not Blocked from US Market - In doing some due diligence on a YouTube video that alleges that the US government prevents certain high-mileage vehicles (record-holding VW Passat) from being sold in the US, I discovered that the differences in same-model-name mileage ratings have to do with a) vehicle size; b) difference in cycle calculations, c) difference in US-UK gallon size. (PESN; May 1, 2012)


Directory:Fuel Efficiency Skeptics - Skeptics say most mileage claims are bunk, and unfortunately, they are probably more correct than incorrect, though their skepticism is often applied to new claims based on past prejudices, rather than actual experimentation on their part.


See also Directory:Humor

  • Smart Car's impact on cars of the future - See a gallary of what some of your favorite cars might look like if they were minaturized in the spirit of the Smart Car. Maybe you've already seen these, but I thought they were hillarious. Check out the Smorvette, Smaudi, Smamborghini, Smorsche (shown at right), Smerrari (Youtatech; June 25, 2009)
  • Featured: Fuel Efficiency > Animal-Powered >
    1 HP Vietnamese Hybrid Runs on Hay - A couple of rural Vietnamese inventors have turned the world of physics on its head by achieving a COP (Cow-efficient of Performance) far in excess of what was possible even a century ago. (Free Energy News; April 1, 2009)
  • Human-Powered >
    Extraordinary Loads on Ordinary Bikes - A collection of 20 images from around the planet, primarily in the developing world, where amazing feats of stacking and balance are achieved, and powered by human locomotion and ingenuity. (TreeHugger; March 30, 2009)

Image:Fahrtwind diagram.jpg Fahrtwind Design
Stereotypical depiction of a 'free energy' device. Hopefully we are all smart enough to know that something like this would not work.

Non-Modification Tips for Economy

Things you can do to increase your mileage, without additives or add-on devices. Focusing on driving habits, etc.

  • - This website has tools that you can use to accurately calculate and track your own fuel mileage (as MPG-US, L/100km, or MPG-UK) and see your actual and projected fuel costs, understand your usage, and practice fuel economy maximizing tips that can help you improve fuel efficiency and decrease your fuel consumption.
  • Fuelly - By recording and analyzing your mileage, you can see how much money you can save with small driving changes. You can also see how your mileage compares with EPA estimates and the mileage of other drivers using Fuelly. Tips and a discussion forum also offer ways to save. The site is free to use, so sign up to start tracking your miles today.

  • Improve Gas Mileage Guide - Want to learn how to improve gas mileage in your car? Learn how to calculate gas mileage and save money on gas without buying a new, high-cost, high-mileage hybrid, and beat the rising gas prices!

  • MPG for Speed - Your car's gas mileage decreases once it gets past its optimal speed. For most cars, this is around 55-60 mph. This means that every time you go over this speed, you're essentially wasting gas and money - and creating unnecessary greenhouse gases.
  • An Alternative to Alternative Fuels - An analytical look at the effect of driving habits (#1 acceleration speed), engine modifications (ECU needs to be in sync), as well as alternate fuels (#1 biodiesel). (OmniNerd; July 16, 2006) http://www.omninerd {dot} com/2006/07/16/articles/57 {spam filter keeps us from posting this url properly}
  • how to get better gas mileage
  • Pumping the gas pedal is somewhat like flushing the toilet. Accelleration takes a lot of gas.
    • Use speed control to maintain a constant speed.
    • Do not accellerate quickly.
    • In stop&go traffic, try to avoid rapid start & rapid stop. Give yourself some buffer space between you and the car ahead to reduce the rapid start & stop cycle of the traffic.
  • Keep tires properly inflated.
  • Keep engine in good shape i.e. cleaned out with Redex periodically
  • Keep windows rolled up for better aerodynamics at high speeds.
  • Turn off the air conditioning at low speeds, and use windows.

Or perhaps you should build for yourself some awareness of the environmental significance of your action. The following paper proposes that the amount of emission each vehicle user is generating can be instantly quantified and visualized in terms of a geographical area that is large enough to absorb all the pollution.

In the News

See News:Fuel Efficiency - content moved to its own page.

Locating Inexpensive Fuel

  • - Breaks down fuel prices by state and location in state.

Discussion Groups and Newsletters

  • Gas Savers Forum (.com) - The Gas Savers Forum was designed to bring people together on a grass-roots level to discuss gas saving tips and tricks, new technologies and more.
  • Hydrogen-Boost Newsletters Research and Development Reports include test results for various fuel economy products and methods.
  • PES Carb - PES' discussion list to facilitate the development of this page and general issues pertaining to the various carburetor open source projects that will be hosted by PES.
  • more (click on the "edit" button to the right of the heading)

Related Sites

  • Shurepower - Truck stop electrification (TSE) technology allows truckers to plug in during rest periods for fuel efficiency, money savings, cleaner air, and a better night's rest. No more idling, noise and vibration during layovers. It delivers power for on board amenities such as heating, cooling and entertainment. Drivers also have access to cable TV, Internet and phone connections.

Related Technologies

Not specifically geared toward a retrofit or even fuel consumption, though still related to transportation. For example, water as fuel, solar power, other propulsion systems that have nothing to do with fossil fuel. If they can be implemented in existing vehicles as a retrofit, then they belong in the "Retrofits" section above.

  • Skytrain - Overhead Supported Light Rail (OSLR) transit runs on steel wheels, which carry heavier loading , larger vehicles and consume less than a quarter of the energy of motion consumed by vehicles on rubber tires. Regenerative braking adds as much as 40% additional savings in energy. Propulsion can be electric or traditional diesel-electric.
    • Skytrain Forerunners - This is the site of the French forerunner of Skytrain which is a carbon copy without any reference to it.
  • DK Group - The Air Cavity System improves the fuel efficiency of ships up to 15% by reducing the frictional resistance of the hull surface. This is achieved by replacing the flat-bottom surface of the vessels hull with a specially designed Air Cavity System that minimizes the hull/water contact area.
  • Moller Skycar - developing a personal air transportation device.
  • Magplane - uses individual passive vehicles, magnetically levitated above a trough of semi-circular cross section, for intracity transportation that will link metropolitan regions. Vehicles are propelled by a linear synchronous motor winding in the magway and controlled by a central computer. They can negotiate horizontal curves of 2 km radius at 360 km/h with airplane comfort.
  • Dual-mode train-tram-bus systems gain momentum - Japanese rail firm JR Hokkaido is poised to launch its dual-mode bus and rail vehicle, that will run on tram or train tracks and is also capable of driving on the road. Preliminary trials suggest the vehicle’s fuel cost is about a quarter of a diesel vehicle, and maintenance cost about one-eighth, while offering the flexibility to extend railed systems. (Gizmag; December 18, 2006)
  • Taxi 2000 - SkyWeb Express is a system of three-passenger vehicles that travel on a network of elevated guideways. Empty vehicles wait for passengers, who select a destination, purchase a ticket, and travel directly to their destinations without stopping. You don't share your trip with strangers, just with your family or friends.
  • MagneMotion - Maglev (M³) transportation system is based on ElectroMagnetic Suspension using only one set of permanent magnets for propulsion, levitation and guidance. It is a cost effective, low power, and energy efficient system for urban environments that cuts travel time and operating cost in half.
  • Air propelled train - Aeromovel is a train that is driven by compressed air and which has no on-board motor. It uses a sail-like propulsion device on what looks like traditional train tracks. Stationary electrical blowers, located close to the passenger stations produce the necessary pressurized air. (AutoblogGreen; Jan. 7, 2008)
  • - modular rail car (switchable, automated) going to prototype phase. Is open to alternative energy technology for power source. concept overview.
  • StarDrive Engineering - "A reactionless space drive that is theoretically capable of breaking the light barrier!! in a somewhat simpler form, could actually now be used for electric power generation on a commercial scale far more efficiently and economically than any other method known"


  • User John Q. Public - is responsible for much of the content on this page. Leave a comment on his 'talk' page. He'll see it next time he logs in.

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