Porsche averages 22.9 mpg combined across 15 models (1984–2026). The best on record does 105 mpg, the thirstiest 14 — a yearly fuel gap of about $2,377.
What that actually costs
What a Porsche costs to feed, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Average combined | 22.9 mpg |
| Fuel per year | $1,677 |
| Most frugal on record | 105 mpg — $366 a year |
| Thirstiest on record | 14 mpg — $2,743 a year |
Porsche models by fuel economy
From the most frugal down. The yearly figure is what the fuel actually costs at 12,000 miles.
| Model | Average mpg | Best / Worst engine | Fuel per year |
|---|---|---|---|
| Porsche Taycan | 93 / 69 | $461 | |
| Porsche Macan | 105 / 19 | $1,289 | |
| Porsche Cayman | 25 / 21 | $1,634 | |
| Porsche 718 Cayman | 25 / 19 | $1,692 | |
| Porsche Boxster | 25 / 20 | $1,699 | |
| Porsche 718 Boxster | 24 / 21 | $1,707 | |
| Porsche 918 | 22 / 22 | $1,745 | |
| Porsche Panamera | 25 / 17 | $1,811 | |
| Porsche 924 | 21 / 21 | $1,829 | |
| Porsche 911 | 25 / 17 | $1,920 | |
| Porsche 944 | 21 / 18 | $1,959 | |
| Porsche 718 Spyder | 20 / 16 | $2,076 | |
| Porsche Cayenne | 24 / 14 | $2,087 | |
| Porsche 968 | 18 / 18 | $2,133 | |
| Porsche 928 | 17 / 15 | $2,494 |
MPG is a number. Dollars per year is the answer.
- Fuel profile built from your actual mileage and local prices
- Fuel tracker: what you really spend, month by month
- Insurance and fuel folded into 5-year cost to own
- Compare any two cars on total cost, not sticker price
- No ads, no tracking — and much more
How we count
Fuel-economy figures come from EPA fueleconomy.gov — the same laboratory numbers printed on the window sticker. We don't adjust them; real-world consumption depends on how and where you drive.
What we add is money. Yearly cost assumes 12,000 miles at $3.20 a gallon — change either and the ranking stays, only the size of the bill moves. Cost per mile is the same figure divided out, useful when comparing a commute against a weekend car.
Frequently asked questions
What is the average Porsche mpg?
22.9 mpg combined across 15 models rated between 1984 and 2026. That averages everything the brand has offered, so a long history of trucks pulls it down.
Which Porsche model is the most economical?
See the table above — models are sorted from the most frugal down, with what each costs in fuel per year.
How much does a Porsche cost to run?
About $1,677 a year in fuel on average, at 12,000 miles and $3.20 a gallon.
Why does the average look low for a modern brand?
Because it covers every model year on record, back to the 1980s. Cars built before the mid-2000s were markedly thirstier — that era is included.