The Audi A6 does 22.4 mpg combined (19.5 city, 27.8 highway), which works out to about $1,714 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 2L 4-cyl does 28 mpg while 4.2L 8-cyl does 18.1 — a difference of $751 a year. Against other V6 cars it sits above the average of 19.9 mpg.
Every Audi A6 engine, compared
Gas mileage on the Audi A6 ranges from 28 down to 18.1 depending on which engine sits under the bonnet — a spread of $751 a year across 7 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 |
|---|---|---|---|---|
| 2L 4-cyl | 24.7 / 33.4 | 2012–2018 | $1,371 | |
| 2L 4-cyl Hybrid | 23.6 / 31.7 | 2019–2025 | $1,455 | |
| 3L 6-cyl | 20.4 / 29.9 | 2002–2026 | $1,613 | |
| 3.2L 6-cyl | 19.5 / 29 | 2010–2011 | $1,670 | |
| 3.1L 6-cyl | 17.8 / 26.4 | 2005–2009 | $1,864 | |
| 2.8L 6-cyl | 16.4 / 23.6 | 1995–2001 | $2,053 | |
| 4.2L 8-cyl | 15.5 / 22.7 | 2000–2011 | $2,122 |
What that actually costs
The Audi A6 burns a gallon every 22.4 miles, so 12,000 miles takes about 536 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.143 |
| Fuel per year | $1,714 |
| Fuel over five years | $8,570 |
| Against other V6 cars | −$216 a year |
| EPA's own estimate | $3,530 a year |
City or highway — who is this car for
The Audi A6 gives up 8.3 mpg the moment you leave the motorway — 27.8 out there against 19.5 in town, a 43% drop worth $588 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 | 19.5 mpg | $1,969 a year if you only drive in town |
| Highway | 27.8 mpg | $1,381 a year if you mostly commute |
| Gap | +8.3 mpg (43%) | Wide — this car dislikes traffic |
How the A6 changed over the years
The A6 peaked in 2016 at 29 mpg (24.5 city, 36 highway) and was at its thirstiest in 2001 at 18 — 11 mpg apart, or $809 a year in fuel between buying one year and the other. The 2026 car does 23. 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 | 20 / 29 | 1 | $1,670 | |
| 2025 | 24 / 31 | 1 | $1,477 | |
| 2024 | 23 / 33 | 1 | $1,477 | |
| 2023 | 24 / 31 | 1 | $1,422 | |
| 2022 | 23 / 32 | 1 | $1,477 | |
| 2021 | 23 / 31 | 1 | $1,477 | |
| 2020 | 24 / 32 | 1 | $1,422 | |
| 2019 | 24 / 32 | 1 | $1,422 | |
| 2018 | 22.5 / 31.5 | 2 | $1,506 | |
| 2017 | 22.5 / 31.5 | 2 | $1,477 | |
| 2016 | 24.5 / 36 | 2 | $1,324 | |
| 2015 | 24.5 / 35.5 | 2 | $1,347 | |
| 2014 | 24.5 / 35.5 | 2 | $1,347 | |
| 2013 | 21.5 / 30 | 2 | $1,567 | |
| 2012 | 22 / 30.5 | 2 | $1,536 | |
| 2011 | 18.5 / 27 | 2 | $1,786 | |
| 2010 | 17 / 25.5 | 2 | $1,920 | |
| 2009 | 17 / 25 | 2 | $1,969 | |
| 2008 | 17 / 25 | 2 | $1,969 | |
| 2007 | 17 / 25 | 2 | $1,969 | |
| 2006 | 16.5 / 24 | 2 | $1,969 | |
| 2005 | 17 / 24 | 1 | $2,021 | |
| 2004 | 16.5 / 23.5 | 2 | $1,969 | |
| 2003 | 16.5 / 24 | 2 | $1,969 | |
| 2002 | 16 / 23 | 2 | $2,076 | |
| 2001 | 15.5 / 23 | 2 | $2,133 | |
| 2000 | 15.5 / 23 | 2 | $2,133 | |
| 1999 | 16 / 25 | 1 | $2,021 | |
| 1998 | 16 / 25 | 1 | $2,021 | |
| 1997 | 17 / 23 | 1 | $2,021 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 50 EPA ratings of the Audi A6 — 7 engines across 1995–2026. 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 $3,530. Full method.
Frequently asked questions
What mpg does the Audi A6 get?
22.4 mpg combined on average — 19.5 in the city and 27.8 on the highway, per EPA ratings across 1995–2026.
How much does a Audi A6 cost in fuel per year?
About $1,714 at 12,000 miles and $3.20 a gallon — roughly $8,570 over five years, or 0.143 dollars a mile.
Which A6 engine is the most economical?
The 2L 4-cyl at 28 mpg, against 18.1 for the 4.2L 8-cyl — a difference of about $751 a year.
Is the A6 good on fuel compared with similar cars?
Against other V6 cars it sits above the average of 19.9 mpg, computed across 4940 ratings.
Are these real-world A6 figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Audi A6 is $3,530 against the $1,714 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 30 and 18 mpg versions of this car is smaller than the spread between two drivers of the same one.
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