miles/gal VS kWh/mile  - Carbon 

MPG = kWh/mile

Note:

Assumes 0.61 kg CO2/kWh    (IPCC because the DOE does not make it clear -

https://www.ipcc.ch/pdf/special-reports/sroc/Tables/t0305.pdf)

and 8.572 kg of CO2/gal. of E10    (US EIA 2018)