The EPA rates electric vehicles in MPGe — miles per gallon equivalent, with 33.7 kWh of electricity counting as one gallon of gasoline. Scanning every class of the complete 2023 EPA dataset for electricity-only vehicles gives the ranking below. The leader, the Hyundai Ioniq 6 Long range RWD (18 inch Wheels), is rated at 140 MPGe combined. Efficiency differences between EVs are real money: at the same electricity price, a 140 MPGe car uses roughly a third less energy per mile than a 95 MPGe one.
| Vehicle | EPA class | Combined MPGe |
|---|---|---|
| Hyundai Ioniq 6 Long range RWD (18 inch Wheels) | Midsize Cars | 140 |
| Lucid Air Touring AWD with 19 inch wheels | Large Cars | 140 |
| Lucid Air Pure AWD with 19 inch wheels | Large Cars | 140 |
| Hyundai Ioniq 6 Standard Range RWD | Midsize Cars | 135 |
| Tesla Model 3 RWD | Midsize Cars | 132 |
| Tesla Model 3 Long Range AWD | Midsize Cars | 131 |
| Lucid Air G Touring XR AWD with 19 inch wheels | Large Cars | 131 |
| Tesla Model Y AWD | Small Sport Utility Vehicle 4WD | 123 |
| Tesla Model Y Long Range AWD | Small Sport Utility Vehicle 4WD | 122 |
| Hyundai Ioniq 6 Long range AWD (18 inch Wheels) | Midsize Cars | 121 |
| Lucid Air Touring AWD with 21 inch wheels | Large Cars | 121 |
| Lucid Air Touring AWD with 20 inch wheels | Large Cars | 121 |
Among our tracked model-years, Tesla's Model 3 and Model Y pages carry their full configuration tables — the 2020 Model 3 Long Range, for example, is rated by the EPA at 130 MPGe combined (136 city / 123 highway), a figure we verified against fueleconomy.gov's own vehicle page during production of this site.
The twelve vehicles above were drawn from 48 electric entries that reached the top five of their EPA classes for 2023 — EVs no longer cluster in one niche class but lead tables from compact cars to standard SUVs. The spread between the most and least efficient entries here is the number to shop by: at a representative electricity price, the annual energy cost difference between a 140 MPGe vehicle and a 121 MPGe vehicle over 15,000 miles is several hundred dollars, before any difference in purchase price. Efficiency also interacts with range — a more efficient vehicle needs a smaller battery to travel the same distance, which is part of why the efficiency leaders tend to be purpose-built electric designs rather than conversions of gasoline models.
Frequently Asked Questions
What does MPGe mean?
Miles per gallon equivalent. The EPA converts electricity use at 33.7 kWh per gallon so EVs can be compared with gasoline vehicles on one scale.
What is the most efficient 2023 EV?
In the EPA dataset, the Hyundai Ioniq 6 Long range RWD (18 inch Wheels) leads at 140 MPGe combined.
Is MPGe the same as range?
No. MPGe measures efficiency; range measures how far the battery takes the vehicle. A large, inefficient EV can still have a long range.