An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Vehicle and Fuel Emissions Testing

National Vehicle and Fuel Emissions Laboratory (NVFEL) 2012 Showcase Supporting Documents

Supporting documents for National Vehicle & Fuel Emissions Laboratory (NVFEL) 2012 Vehicle Technology Showcase page are here:

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.