Lasted edited by Andrew Munsey, updated on June 15, 2016 at 2:12 am.
To continue to improve air quality, tighter standards are needed. The
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Super Ultra Low Emission Vehicle represents today's state-of-the-art in emissions control, and is a substantial leap forward compared to the current federal standard. A Super Ultra Low Emission Vehicle-rated vehicle approximately 90% cleaner than the average new car. Super Ultra Low Emission Vehicle standards are based on a 120,000 mile lifetime instead of a 100,000 mile lifetime for Tier 1 standards.