Gasoline (petrol) is the primary portion of oil use (about 40%) in the U.S. [1] I don't know what portion of that is passenger cars, but it's probably substant

Gasoline (petrol) is the primary portion of oil use (about 40%) in the U.S. [1] I don't know what portion of that is passenger cars, but it's probably substantial. 1. https://www.eia.gov/energyexplained/index.cfm?page=oil_use https://www.eia.gov/energyexplained/index.cfm?page=oil_use