A gas vehicle produces 19.6 pounds of CO2 per gallon of fuel used, diesel vehicles produce 22.4 To estimate CO2 using known miles per gallon (MPG) for a gas vehicle: 19.6 lbs. of CO2 per gal. / MPG = lbs. of CO2 per mile 19.6/18 = 1.08 pounds of CO2 per mile
A gas vehicle produces 19.6 pounds of CO2 per gallon of fuel used, diesel vehicles produce 22.4 (Source: US Energy Information Administration http://www.eia.doe.gov/