The Toyota Prius Prime does 53.5 mpg combined (54.5 city, 52.5 highway), which works out to about $718 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 1.8L 4-cyl Plug-in hybrid does 54 mpg while 2L 4-cyl Plug-in hybrid does 52 — a difference of $27 a year. Against other Plug-in hybrid cars it sits above the average of 36.5 mpg.
Every Toyota Prius Prime engine, compared
Gas mileage on the Toyota Prius Prime ranges from 54 down to 52 depending on which engine sits under the bonnet — a spread of $27 a year across 2 versions of the same car. Picking the right one often saves more fuel than picking a different car altogether. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 1.8L 4-cyl Plug-in hybrid | 55 / 53 | 2017–2022 | $711 | |
| 2L 4-cyl Plug-in hybrid | 53 / 51 | 2023–2024 | $738 |
What that actually costs
The Toyota Prius Prime burns a gallon every 53.5 miles, so 12,000 miles takes about 224 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.060 |
| Fuel per year | $718 |
| Fuel over five years | $3,590 |
| Against other Plug-in hybrid cars | −$334 a year |
| EPA's own estimate | $1,163 a year |
City or highway — who is this car for
The Toyota Prius Prime is one of the cars that does better in town than out of it — 54.5 in the city against 52.5 on the highway. That is $26 a year in favour of the commuter stuck in traffic, and it usually means a hybrid drivetrain recovering energy every time you brake.
| Measure | Value | Reading |
|---|---|---|
| City | 54.5 mpg | $705 a year if you only drive in town |
| Highway | 52.5 mpg | $731 a year if you mostly commute |
| Gap | -2 mpg (-4%) | Reversed — it does better in town than on the open road |
How the Prius Prime changed over the years
The Prius Prime peaked in 2022 at 54 mpg (55 city, 53 highway) and was at its thirstiest in 2024 at 52 — 2 mpg apart, or $27 a year in fuel between buying one year and the other. The 2024 car does 52. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2024 | 53 / 51 | 1 | $738 | |
| 2023 | 53 / 51 | 1 | $738 | |
| 2022 | 55 / 53 | 1 | $711 | |
| 2021 | 55 / 53 | 1 | $711 | |
| 2020 | 55 / 53 | 1 | $711 | |
| 2019 | 55 / 53 | 1 | $711 | |
| 2018 | 55 / 53 | 1 | $711 | |
| 2017 | 55 / 53 | 1 | $711 |
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How we count
This page rests on 8 EPA ratings of the Toyota Prius Prime — 2 engines across 2017–2024. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $1,163. Full method.
Frequently asked questions
What mpg does the Toyota Prius Prime get?
53.5 mpg combined on average — 54.5 in the city and 52.5 on the highway, per EPA ratings across 2017–2024.
How much does a Toyota Prius Prime cost in fuel per year?
About $718 at 12,000 miles and $3.20 a gallon — roughly $3,590 over five years, or 0.060 dollars a mile.
Which Prius Prime engine is the most economical?
The 1.8L 4-cyl Plug-in hybrid at 54 mpg, against 52 for the 2L 4-cyl Plug-in hybrid — a difference of about $27 a year.
Is the Prius Prime good on fuel compared with similar cars?
Against other Plug-in hybrid cars it sits above the average of 36.5 mpg, computed across 165 ratings.
Are these real-world Prius Prime figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Toyota Prius Prime is $1,163 against the $718 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 54 and 52 mpg versions of this car is smaller than the spread between two drivers of the same one.