This web page provides information on test programs and modeling estimating the emissions impacts of changes in fuel properties and composition. Information on how fuel effects are applied in MOVES and NONROAD is available on the web pages for those models.
EPAct/V2/E-89 Gasoline Fuel Effects Study
This web page provides information on a gasoline fuel effects program jointly sponsored by EPA, DOE/NREL, and the Coordinating Research Council examining the effects of five parameters (aromatics, ethanol, RVP, T50, T90) on exhaust emissions from light-duty Tier 2 vehicles.
Ultra-Low Sulfur Gasoline Emissions Study
This web page provides information on EPA's study of effects of low sulfur gasoline (< 10ppm) on Tier 2 vehicles recruited from the in-use fleet.
Heavy-Duty Diesel Fuel Analysis Program
This web page provides information on EPA's heavy-duty diesel fuel analysis program, which sought to quantify the air pollution emission effects of diesel fuel parameters on various nonroad and highway heavy-duty diesel engines. The program examined the hydrocarbon (HC), oxides of nitrogen (NOx) and particulate matter (PM) emission impacts of diesel fuel parameters including such parameters as cetane number, aromatics content, and fuel density.
Computer Models Related to the Reformulated Gasoline (RFG) Program
These models are used to determine whether gasoline complies with RFG and anti-dumping emissions performance standards.
Biodiesel Emissions Analysis Program
This web page provides information on EPA's biodiesel emissions analysis program, which uses existing data to quantify the air pollution emission effects of biodiesel for diesel engines that have not been specifically modified to operate on biodiesel. The program will examine the emission impacts of biodiesel and biodiesel/diesel blends for both regulated and unregulated pollutants, as well as fuel economy.