Mercedes-Benz SL65 AMG
What it costs to keep fuelled
$2,824a year, fuel only
The 2015 Mercedes-Benz SL65 AMG is EPA-rated at 17 MPG combined (14 city / 21 highway). Over 15,000 miles a year that is about 882 gallons, $2824 a year in fuel, or $0.188 per mile at $3.20/gal.
Across its full 2005–2015 run it averages 14.9 MPG, improving by 4 MPG over 9 model years.
The band is how far one gallon carries it: 17 of the 60 MPG this scale runs to. The square tick is the two seaters average, 21.4.
- Fuel, per year
- $2,824 at 15,000 mi
- Per mile
- $0.188
- Per kilometre
- $0.117
- Gallons burned/yr
- 882
1 mile = 1.609344 km · fuel at $3.20/gal, fixed JUL 2026
Test figure — not a road resultSOURCE·US EPA fuel-economy test data·FUEL ASSUMED AT $3.20/GAL FROM JUL 2026·REVIEWED JUL 2026
How this is worked out
- Start from the EPA combined figure for the model year — a laboratory test cycle run to a fixed procedure, not a road result. Where a year sold several engines or drivetrains, the trims are averaged and the trim count is printed beside the row so you can see how much averaging is behind it.
- Fix a pump price. This site keeps one reference price, $3.20 a US gallon, fixed JUL 2026 and printed next to every dollar figure it produces. It is an assumption with a date on it, not a quote — put your own price in.
- Fix an annual distance. Every annual figure on this site uses 15,000 miles a year, roughly the US average. A cost per year with no stated distance is not a number, it is a mood.
- Divide distance by economy for gallons, multiply by price for the year's fuel, divide price by economy for one mile. The per-kilometre line is that last figure divided by 1.609344 — the same money, in the unit most of the world drives in.
- Stop there. No depreciation, no tyres, no insurance, no servicing. This is the fuel line of the ledger and it is labelled as one; depreciation usually dwarfs everything on it.
gallons/yr = miles/yr ÷ MPG fuel $/yr = gallons/yr × $/gal cost $/mi = $/gal ÷ MPG cost $/km = cost $/mi ÷ 1.609344
The full method, the licence note, and what a test figure cannot tell you →
Re-run the ledger at another pump price
Every line above rests on one pump price. Here is the same entry re-costed at six others, because the price is the part that changes while the test sheet stays put.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.147 | $1471 | $2206 | $2941 |
| $3.00/gal | $0.176 | $1765 | $2647 | $3529 |
| $3.20/gal | $0.188 | $1882 | $2824 | $3765 |
| $3.50/gal | $0.206 | $2059 | $3088 | $4118 |
| $4.00/gal | $0.235 | $2353 | $3529 | $4706 |
| $4.50/gal | $0.265 | $2647 | $3971 | $5294 |
| $5.00/gal | $0.294 | $2941 | $4412 | $5882 |
SOURCE·US EPA fuel-economy test data·FUEL ASSUMED AT $3.20/GAL FROM JUL 2026·REVIEWED JUL 2026
The whole service history, sheet by sheet
9 model years on file. Read down the combined column: a nameplate that got heavier shows it here long before any brochure admits it.
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2015 | 17 MPG | 14 | 21 | $4550 | 537 | 1 |
| 2014 | 17 MPG | 14 | 21 | $4550 | 537 | 1 |
| 2013 | 17 MPG | 14 | 21 | $4550 | 537 | 1 |
| 2011 | 14 MPG | 12 | 18 | $5500 | 635 | 1 |
| 2009 | 14 MPG | 11 | 18 | $5500 | 635 | 1 |
| 2008 | 14 MPG | 11 | 18 | $5500 | 635 | 1 |
| 2007 | 14 MPG | 11 | 18 | $5500 | 635 | 1 |
| 2006 | 14 MPG | 12 | 18 | $5500 | 635 | 1 |
| 2005 | 13 MPG | 11 | 18 | $5950 | 684 | 1 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
SOURCE·US EPA fuel-economy test data·FUEL ASSUMED AT $3.20/GAL FROM JUL 2026·REVIEWED JUL 2026
Marked against the rest of the two seaters bay
Among the 105 two seaters models tracked here, the Mercedes-Benz SL65 AMG ranks 68 on current figures, against a class average of 21.4 MPG — the square tick on the gauge above.
Closest more-efficient alternatives in the same class: Acura NSX (18), Cadillac XLR (18), Chevrolet Corvette (18), Jaguar F-Type R AWD Convertible (18), Jaguar F-Type R AWD Coupe (18).
Tailpipe CO₂ is rated at 537 grams per mile, which works out to roughly 8.1 tonnes a year at 15,000 miles.
Questions asked across the counter
What MPG does the Mercedes-Benz SL65 AMG get?
The 2015 Mercedes-Benz SL65 AMG is rated at 17 MPG combined by the EPA — 14 city and 21 highway. Across all 9 model years in the database it averages 14.9 MPG, ranging from 13 to 17 depending on year and trim.
How much does a Mercedes-Benz SL65 AMG cost in fuel per year?
At 17 MPG and 15,000 miles a year, it burns about 882 gallons — roughly $2824 a year with fuel at $3.20 a gallon, or $0.188 per mile. The EPA's own published annual figure for the 2015 model is $4550.
Has the Mercedes-Benz SL65 AMG become more efficient over time?
Yes. It has gone from 13 MPG in 2005 to 17 in 2015 — an improvement of 4 MPG, or 31% across 9 model years.
Is the Mercedes-Benz SL65 AMG efficient for its class?
It ranks 68 of 105 in the Two Seaters class on current figures, against a class average of 21.4 MPG. That is 4.4 worse than typical for the class.
Pull another logbook off the same shelf
Same class, nearest economy first — the ones a buyer is genuinely choosing between.
SOURCE·US EPA fuel-economy test data·FUEL ASSUMED AT $3.20/GAL FROM JUL 2026·REVIEWED JUL 2026
Cost per mile, per kilometre and per year are computed at a reference price of $3.20 a gallon over 15,000 miles, fixed JUL 2026 — set your own pump price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.
