The Porsche Cayenne does 18.5 mpg combined (16.6 city, 21.6 highway), which works out to about $2,076 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 3L 6-cyl Plug-in hybrid does 21.7 mpg while 4.5L 8-cyl does 14 — a difference of $973 a year. Against other V8 cars it sits above the average of 16.1 mpg.
Every Porsche Cayenne engine, compared
Gas mileage on the Porsche Cayenne ranges from 21.7 down to 14 depending on which engine sits under the bonnet — a spread of $973 a year across 9 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 |
|---|---|---|---|---|
| 3L 6-cyl Plug-in hybrid | 20.7 / 23.3 | 2015–2020 | $1,770 | |
| 3L 6-cyl Hybrid | 20.1 / 23.3 | 2011–2025 | $1,820 | |
| 3L 6-cyl | 18.6 / 24.8 | 2013–2026 | $1,846 | |
| 4L 8-cyl Hybrid | 17 / 20 | 2023–2023 | $2,133 | |
| 3.6L 6-cyl | 15.6 / 21.6 | 2007–2018 | $2,157 | |
| 4L 8-cyl | 15 / 20 | 2019–2026 | $2,220 | |
| 4.8L 8-cyl | 14.2 / 20.4 | 2007–2018 | $2,299 | |
| 3.2L 6-cyl | 14 / 18 | 2004–2006 | $2,560 | |
| 4.5L 8-cyl | 12 / 17 | 2003–2006 | $2,743 |
What that actually costs
The Porsche Cayenne burns a gallon every 18.5 miles, so 12,000 miles takes about 649 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.173 |
| Fuel per year | $2,076 |
| Fuel over five years | $10,380 |
| Against other V8 cars | −$309 a year |
| EPA's own estimate | $4,269 a year |
City or highway — who is this car for
The Porsche Cayenne gives up 5 mpg the moment you leave the motorway — 21.6 out there against 16.6 in town, a 30% drop worth $535 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 | 16.6 mpg | $2,313 a year if you only drive in town |
| Highway | 21.6 mpg | $1,778 a year if you mostly commute |
| Gap | +5 mpg (30%) | Wide — this car dislikes traffic |
How the Cayenne changed over the years
The Cayenne peaked in 2016 at 21 mpg (18.7 city, 24.3 highway) and was at its thirstiest in 2003 at 14 — 7 mpg apart, or $914 a year in fuel between buying one year and the other. The 2026 car does 18.5. 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 |
|---|---|---|---|---|
| 2026 | 16 / 22.5 | 2 | $2,076 | |
| 2025 | 17.7 / 22.7 | 3 | $1,949 | |
| 2024 | 16 / 22 | 2 | $2,133 | |
| 2023 | 16.3 / 20.3 | 3 | $2,133 | |
| 2022 | 17.3 / 21 | 3 | $2,021 | |
| 2021 | 18 / 21.3 | 3 | $1,990 | |
| 2020 | 18 / 21.3 | 3 | $1,990 | |
| 2019 | 18 / 21.3 | 3 | $1,949 | |
| 2018 | 17.7 / 23 | 3 | $1,949 | |
| 2017 | 17.7 / 23 | 3 | $1,949 | |
| 2016 | 18.7 / 24.3 | 3 | $1,829 | |
| 2015 | 18.3 / 24.7 | 3 | $1,855 | |
| 2014 | 18.3 / 25 | 3 | $1,855 | |
| 2013 | 18.3 / 25 | 3 | $1,855 | |
| 2012 | 17.7 / 23 | 3 | $1,990 | |
| 2011 | 17.3 / 22.7 | 3 | $1,990 | |
| 2010 | 13.5 / 19 | 2 | $2,477 | |
| 2009 | 13.5 / 19 | 2 | $2,477 | |
| 2008 | 13.5 / 19 | 2 | $2,477 | |
| 2007 | 13.5 / 19.5 | 2 | $2,477 | |
| 2006 | 13 / 17.5 | 2 | $2,648 | |
| 2005 | 13 / 17.5 | 2 | $2,648 | |
| 2004 | 13 / 17.5 | 2 | $2,648 | |
| 2003 | 12 / 17 | 1 | $2,743 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 61 EPA ratings of the Porsche Cayenne — 9 engines across 2003–2026. 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 $4,269. Full method.
Frequently asked questions
What mpg does the Porsche Cayenne get?
18.5 mpg combined on average — 16.6 in the city and 21.6 on the highway, per EPA ratings across 2003–2026.
How much does a Porsche Cayenne cost in fuel per year?
About $2,076 at 12,000 miles and $3.20 a gallon — roughly $10,380 over five years, or 0.173 dollars a mile.
Which Cayenne engine is the most economical?
The 3L 6-cyl Plug-in hybrid at 21.7 mpg, against 14 for the 4.5L 8-cyl — a difference of about $973 a year.
Is the Cayenne good on fuel compared with similar cars?
Against other V8 cars it sits above the average of 16.1 mpg, computed across 3323 ratings.
Are these real-world Cayenne 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 Cayenne is $4,269 against the $2,076 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 24 and 14 mpg versions of this car is smaller than the spread between two drivers of the same one.
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