{"data":{"id":"us/10-cfr-474.3","jurisdiction":"us","citation":"10 CFR 474.3","heading":"Petroleum-equivalent fuel economy calculation.","body":"(a) The petroleum-equivalent fuel economy for an electric vehicle is calculated as follows:\n(1) Determine the electric vehicle's Urban Dynamometer Driving Schedule energy consumption value and the Highway Fuel Economy Driving Schedule energy consumption value in units of Watt-hours per mile;\n(2) Determine the combined energy consumption value by averaging the Urban Dynamometer Driving Schedule energy consumption value and the Highway Fuel Economy Driving Schedule energy consumption value using a weighting of 55 percent urban/45 percent highway; and\n(3) Calculate the petroleum-equivalent fuel economy by dividing the appropriate petroleum-equivalency factor (depending on whether any petroleum-powered accessories are installed; see paragraph (b) of this section) by the combined energy consumption value, and round to the nearest 0.01 miles per gallon.\n(b) The petroleum-equivalency factors for electric vehicles are as follows:\n(1) If the electric vehicle does not have any petroleum-powered accessories installed, the value of the petroleum equivalency factor is 12,307 Watt-hours per gallon.\n(2) If the electric vehicle has any petroleum-powered accessories installed, the value of the petroleum-equivalency factor is 11,706 Watt-hours per gallon.","path":["Title 10—Energy","CHAPTER II—DEPARTMENT OF ENERGY","SUBCHAPTER D—ENERGY CONSERVATION","PART 474—ELECTRIC AND HYBRID VEHICLE RESEARCH, DEVELOPMENT, AND DEMONSTRATION PROGRAM; PETROLEUM-EQUIVALENT FUEL ECONOMY CALCULATION"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-10.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:09Z","sha256":"1f82050f90d0ba8ec45be403534c908f91c364a8e2ad094b9c523f48cbf2b16a","source_id":"us-cfr","stale":true,"prev":"us/10-cfr-474.2","next":"us/10-cfr-474.4"},"notice":"GroundRules: Original legal text. Not legal advice."}