2023 Mercedes-Benz AMG SL63 4matic Plus MPG & Specs — Real-World vs EPA, All Trims
Every gas trim of this model takes premium.
Is the 2023 Mercedes-Benz AMG SL63 4matic Plus good on gas?
At up to 16 MPG combined, the 2023 Mercedes-Benz AMG SL63 4matic Plus is worse than average for a Minicompact Cars — that class averages about 21.0 MPG across 1,662 EPA-tested versions, so it's on the thirsty side for its size.
Real-world MPG vs the EPA number
The EPA figures above come from a standardized dynamometer test, not the open road — real-world MPG typically runs a bit lower depending on your driving, climate and terrain. That's true of every car on this site, old or new.
At today's AAA national average price — $4.68/gal for premium gas as of 2026-07-05 — the most efficient trim runs about $4,388/year (roughly $366/month, about $29.25 per 100 miles) at the EPA's assumed 15,000 miles/year, using an estimated 938 gallons a year. We don't estimate a cost-per-fill since exact tank size isn't in the public EPA dataset, but the per-100-mile figure scales to any tank. Current national average gas prices →
2023 Mercedes-Benz AMG SL63 4matic Plus trims & fuel economy
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr (today's price) |
|---|---|---|---|
| 4.0L 8-cyl, Automatic 9-spd, AWD | PREMIUM | 16 | $4,388 |
2023 Mercedes-Benz AMG SL63 4matic Plus specs
What the EPA test-car listings record for this model year — every combination sold is a row in the trims table above.
| Engine options | 4.0L 8-cyl turbo |
| Transmission | Automatic 9-spd |
| Drive type | AWD |
| EPA body class | Minicompact Cars |
| Fuel | Premium |
| Tailpipe CO₂ | 544 g/mi |
| Gas guzzler tax | Yes — at least one trim carried the federal guzzler tax |
Other years of the Mercedes-Benz AMG SL63 4matic Plus
Similar cars (Minicompact Cars)
Cars that take premium · Cheapest cars to fuel · Where fuel grade depends on the trim · Fuel guides
1 trim(s) · EPA FuelEconomy.gov data retrieved 2026-10-25 · fuel prices AAA national average as of 2026-07-05.