Tier 3 Vehicle and Gasoline Sulfur Program

The Tier 3 Vehicle and Gasoline Sulfur Program requires new passenger vehicles, including sport utility vehicles, pick-up trucks, and vans, to meet stringent emissions standards. New emissions standards apply to all light-duty vehicles, regardless of whether they run on gasoline, diesel, or alternative fuels. Additionally, this program requires gasoline refiners and importers to reduce the sulfur content of gasoline sold in the United States. For more information, see the U.S. Environmental Protection Agency Emission Standards website. (Reference 40 CFR 80, 85, and 86)