The Porsche 918 does 22 mpg combined (20 city, 24 highway), which works out to about $1,745 a year in fuel at $3.20 a gallon and 12,000 miles. Against other Plug-in hybrid cars it sits below the average of 35.6 mpg.
Every Porsche 918 engine, compared
The Porsche 918 was rated in a single specification, so its gas mileage does not vary by version — only by model year. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 4.6L 8-cyl Plug-in hybrid | 20 / 24 | 2015–2015 | $1,745 |
What that actually costs
The Porsche 918 burns a gallon every 22 miles, so 12,000 miles takes about 545 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.145 |
| Fuel per year | $1,745 |
| Fuel over five years | $8,725 |
| Against other Plug-in hybrid cars | +$666 a year |
| EPA's own estimate | $3,500 a year |
City or highway — who is this car for
The Porsche 918 gives up 4 mpg the moment you leave the motorway — 24 out there against 20 in town, a 20% drop worth $320 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 20 mpg | $1,920 a year if you only drive in town |
| Highway | 24 mpg | $1,600 a year if you mostly commute |
| Gap | +4 mpg (20%) | Typical for its type |
How the 918 changed over the years
Combined figure across the 1 model year the 918 was rated in, all of them at 22 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2015 | 20 / 24 | 1 | $1,745 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 1 EPA ratings of the Porsche 918 — 1 engine across 2015–2015. 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 $3,500. Full method.
Frequently asked questions
What mpg does the Porsche 918 get?
22 mpg combined on average — 20 in the city and 24 on the highway, per EPA ratings across 2015–2015.
How much does a Porsche 918 cost in fuel per year?
About $1,745 at 12,000 miles and $3.20 a gallon — roughly $8,725 over five years, or 0.145 dollars a mile.
Which 918 engine is the most economical?
The 4.6L 8-cyl Plug-in hybrid at 22 mpg.
Is the 918 good on fuel compared with similar cars?
Against other Plug-in hybrid cars it sits below the average of 35.6 mpg, computed across 157 ratings.
Are these real-world 918 figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Porsche 918 is $3,500 against the $1,745 we compute at 12,000 miles. Expect a little worse in practice: the spread between the city and highway figures is smaller than the spread between two drivers of the same one.
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