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Edmunds. "Electric Car Range and Consumption: EPA vs. Edmunds." Edmunds.com, 2024. edmunds.com/car-news/electric-car-range-and-consumption-epa-vs-edmunds.html. EV efficiency (kWh/100 mi, Edmunds tested) converted to MPK (Miles Per kWh).
U.S. Environmental Protection Agency. "Fuel Economy Guide." FuelEconomy.gov, 2025. fueleconomy.gov. Gas and hybrid MPG, 2025–2026 model year. Gasoline combustion at 19.6 lbs CO₂/gallon.
U.S. Environmental Protection Agency. "eGRID." EPA.gov, 2023. epa.gov/egrid. State grid CO₂ factors (lbs/kWh). Solar = 0 lbs CO₂/kWh.
ElectricChoice. "Electricity Rates by State." ElectricChoice.com, March 2026. electricchoice.com/electricity-prices-by-state. State avg residential electricity prices, updated monthly.
AAA. "Today's State Averages." GasPrices.AAA.com, 2026. gasprices.aaa.com/todays-state-averages. State avg regular unleaded prices, updated daily.
Good Car Bad Car. "Best-Selling Cars in America, 2024." GoodCarBadCar.net, 2025. goodcarbadcar.net. Annual U.S. unit sales, calendar year 2024.

Efficiency Leaderboard

Car models ranked by fuel cost and emissions.

#	Photo	Model ▼	Fuel Cost / Year ▼	CO2 Emissions / Year ▼	Annual Unit Sales ▼

Edmunds. "Electric Car Range and Consumption: EPA vs. Edmunds." Edmunds.com, 2024. edmunds.com/car-news/electric-car-range-and-consumption-epa-vs-edmunds.html. EV efficiency (kWh/100 mi, Edmunds tested) converted to MPK (Miles Per kWh).
U.S. Environmental Protection Agency. "Fuel Economy Guide." FuelEconomy.gov, 2025. fueleconomy.gov. Gas and hybrid MPG, 2025–2026 model year. Gasoline combustion at 19.6 lbs CO₂/gallon.
U.S. Environmental Protection Agency. "eGRID." EPA.gov, 2023. epa.gov/egrid. State grid CO₂ factors (lbs/kWh). Solar = 0 lbs CO₂/kWh.
ElectricChoice. "Electricity Rates by State." ElectricChoice.com, March 2026. electricchoice.com/electricity-prices-by-state. State avg residential electricity prices, updated monthly.
AAA. "Today's State Averages." GasPrices.AAA.com, 2026. gasprices.aaa.com/todays-state-averages. State avg regular unleaded prices, updated daily.
Good Car Bad Car. "Best-Selling Cars in America, 2024." GoodCarBadCar.net, 2025. goodcarbadcar.net. Annual U.S. unit sales, calendar year 2024.