2018 Mercedes-Benz AMG® GT Gas Tank Size & Fuel Capacity
Fuel tank capacity
19.8gal · 75 L
The 2018 Mercedes-Benz AMG® GT has a fuel tank capacity of 19.8 gallons (75 liters) on every trim.
A full tank is good for roughly 396–436 highway miles or 297–317 miles around town, going by the EPA ratings.
19.8 gal · Bigger than 67% of 2018 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- FAQ
2018 Mercedes-Benz AMG® GT fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 2dr Convertible 4.0L 8cyl Turbo 7AM · RWD MPG 16 / 21Range 317 / 416 mi | 4.0L 8cyl Turbo 7AM | RWD | 19.8 gal75 L | 16 / 21 | 317 / 416 mi | |
| 2dr Coupe 4.0L 8cyl Turbo 7AM · RWD MPG 16 / 22Range 317 / 436 mi | 4.0L 8cyl Turbo 7AM | RWD | 19.8 gal75 L | 16 / 22 | 317 / 436 mi | |
| C 2dr Convertible 4.0L 8cyl Turbo 7AM · RWD MPG 15 / 20Range 297 / 396 mi | 4.0L 8cyl Turbo 7AM | RWD | 19.8 gal75 L | 15 / 20 | 297 / 396 mi | |
| C 2dr Coupe 4.0L 8cyl Turbo 7AM · RWD MPG 15 / 20Range 297 / 396 mi | 4.0L 8cyl Turbo 7AM | RWD | 19.8 gal75 L | 15 / 20 | 297 / 396 mi | |
| R 2dr Coupe 4.0L 8cyl Turbo 7AM · RWD MPG 15 / 20Range 297 / 396 mi | 4.0L 8cyl Turbo 7AM | RWD | 19.8 gal75 L | 15 / 20 | 297 / 396 mi | |
| S 2dr Coupe 4.0L 8cyl Turbo 7AM · RWD MPG 16 / 22Range 317 / 436 mi | 4.0L 8cyl Turbo 7AM | RWD | 19.8 gal75 L | 16 / 22 | 317 / 436 mi | |
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 2018 Mercedes-Benz AMG® GT goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 17 MPG, a full 19.8-gallon tank covers about 337 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 19.8 | 396 | 297 |
| 3/4 | 14.9 | 297 | 223 |
| 1/2 | 9.9 | 198 | 149 |
| 1/4 | 5.0 | 99 | 74 |
| 1/8 | 2.5 | 50 | 37 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 882 gallons, roughly 45 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
- EPA combined
- 17–18 MPG
- Tailpipe CO2
- 486–522 g/mi
- EPA greenhouse score
- 3 of 10
- Gas guzzler tax
- Yes
- Source
- EPA ratings
What it costs to fill up a 2018 Mercedes-Benz AMG® GT
$104.54 to fill the 19.8-gallon tank from empty with premium, at this week's US average of $5.28 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 19.8 gal | Premium | $5.28 | $104.54 | $78.41 |
By region, 19.8-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $97.61 |
| Midwest | $5.37 | $106.33 |
| Gulf CoastLowest | $4.57 | $90.49 |
| Rocky Mountain | $5.12 | $101.38 |
| West Coast | $6.08 | $120.38 |
| CaliforniaHighest | $6.36 | $125.93 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 19.8-gallon tank$104.54
- A year of driving (15,000 mi)$4,659
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
AMG® GT tank size in other years
The 2018 AMG® GT uses the same 19.8 gal tank as every AMG® GT since 2016.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2023 AMG® GT | 21.1 gal | 506 mi |
| 2022 AMG® GT | 21.1 gal | 528 mi |
| 2021 AMG® GT | 19.8–21.1 gal | 528 mi |
| 2020 AMG® GT | 19.8–21.1 gal | 506 mi |
| 2019 AMG® GT | 17.4–19.8 gal | 436 mi |
| 2018 AMG® GT | 19.8 gal | 436 mi |
| 2017 AMG® GT | 19.8 gal | 436 mi |
| 2016 AMG® GT | 19.8 gal | 436 mi |
2018 Mercedes-Benz AMG® GT vs similar 2018 coupes
At 19.8 gallons, the AMG® GT's largest tank ranks second of the four 2018 coupes compared here. The Audi R8 carries the most (21.9 gal) and the Acura NSX the least (15.6 gal).
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Audi R8 | 19.3–21.9 gal | 548 mi |
| Mercedes-Benz AMG® GT | 19.8 gal | 436 mi |
| Cadillac ATS Coupe | 16.0 gal | 496 mi |
| Acura NSX | 15.6 gal | 343 mi |
Other 2018 coupes of a similar size, one model per brand.
2018 Mercedes-Benz AMG® GT fuel system recalls
None of the 7 recalls NHTSA lists for the 2018 Mercedes-Benz AMG® GT involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2018 Mercedes-Benz AMG® GT?
The 2018 Mercedes-Benz AMG® GT holds 19.8 gallons (75 liters) on every trim we list.
How many gallons and liters does the 2018 Mercedes-Benz AMG® GT gas tank hold?
The 2018 Mercedes-Benz AMG® GT tank holds 75 liters, or 19.8 gallons in US gallons.
How far can a 2018 Mercedes-Benz AMG® GT go on a full tank?
About 396–436 miles on the highway and 297–317 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2018 Mercedes-Benz AMG® GT go on a quarter tank?
About 99 highway miles or 74 in town from the 19.8-gallon tank, which has roughly 5.0 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 Mercedes-Benz AMG® GT take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Mercedes-Benz AMG® GT?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 19.8-gallon tank from empty costs $104.54. It ranges from $90.49 in the Gulf Coast to $125.93 in California.
How much does a full tank of gas weigh in a 2018 Mercedes-Benz AMG® GT?
About 123 pounds for the 19.8-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Mercedes-Benz AMG® GT have a bigger gas tank than the Audi R8?
No. The 2018 Audi R8 holds up to 21.9 gallons; the 2018 Mercedes-Benz AMG® GT holds up to 19.8.
Has the 2018 Mercedes-Benz AMG® GT had a fuel pump or fuel system recall?
No. None of the 7 recalls NHTSA lists for the 2018 Mercedes-Benz AMG® GT involve the fuel system.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
- Recalls: NHTSA recall database (Mercedes-Benz fuel system recalls).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.