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MOVES and Related Models

Ultra-Low Sulfur Gasoline Emissions Study

Understanding the effects of gasoline sulfur level on the in-use fleet is important for assessing emissions inventories and impacts of future policy decisions. This study recruited 93 Tier 2 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.