Modeling and Inventories
Ultra-Low Sulfur Gasoline Emissions Study
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Understanding the effects of gasoline sulfur level in the in-use fleet is nescessary for assessing in-use emissions inventories and impacts of future policy decisions. This study recruited 81 cars and light trucks from owners in southeast Michigan, covering high sales vehicles of model years 2007-9 with approximately 20,000-40,000 odometer miles. Test fuels were two non-ethanol gasolines with properties typical of certification fuel, one at a sulfur content of 5 ppm and the other at 28 ppm (representative of retail fuel in the recruiting area). Emissions for gaseous and particulate matter were measured over the Federal Test Procedure at 75°F. Program design, data collection, and statistical analyses of the resulting data are described in this draft study report. The study database linked below contains vehicle, fuel, and emissions data used to perform the analyses.
- Draft Study Report (PDF) (63 pp, 1.0MB, EPA-420-D-13-003, April 2013)
- Appendices for Draft Study Report (ZIP) (8.2MB, April 2013)
- Draft Report Database (Excel) (516K, April 2013)