2018 Audi S3 Gas Tank Size & Fuel Capacity
Fuel tank capacity
14.5gal · 55 L
The 2018 Audi S3 has a fuel tank capacity of 14.5 gallons (55 liters) on every trim.
A full tank is good for roughly 406 highway miles or 319 miles around town, going by the EPA ratings.
14.5 gal · Smaller than 80% 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 Audi S3 fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 4 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 2.0 TFSI Premium Plus quattro 4dr Sedan AWD (built to 6/18) 2.0L 4cyl 7AM · AWD MPG 22 / 28Range 319 / 406 mi | 2.0L 4cyl 7AM | AWD | 14.5 gal55 L | 22 / 28 | 319 / 406 mi | |
| 2.0 TFSI Premium Plus quattro Summer of Audi 4dr Sedan AWD 2.0L 4cyl Turbo 7AM · AWD MPG 22 / 28Range 319 / 406 mi | 2.0L 4cyl Turbo 7AM | AWD | 14.5 gal55 L | 22 / 28 | 319 / 406 mi | |
| 2.0 TFSI Prestige quattro 4dr Sedan AWD (built to 6/18) 2.0L 4cyl 7AM · AWD MPG 22 / 28Range 319 / 406 mi | 2.0L 4cyl 7AM | AWD | 14.5 gal55 L | 22 / 28 | 319 / 406 mi | |
| 2.0 TFSI Prestige quattro Summer of Audi 4dr Sedan AWD 2.0L 4cyl Turbo 7AM · AWD MPG 22 / 28Range 319 / 406 mi | 2.0L 4cyl Turbo 7AM | AWD | 14.5 gal55 L | 22 / 28 | 319 / 406 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 Audi S3 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 25 MPG, a full 14.5-gallon tank covers about 363 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 14.5 | 406 | 319 |
| 3/4 | 10.9 | 305 | 239 |
| 1/2 | 7.3 | 203 | 160 |
| 1/4 | 3.6 | 102 | 80 |
| 1/8 | 1.8 | 51 | 40 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 600 gallons, roughly 41 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
- 25 MPG
- Tailpipe CO2
- 359 g/mi
- EPA greenhouse score
- 5 of 10
- Source
- EPA ratings
What it costs to fill up a 2018 Audi S3
$76.56 to fill the 14.5-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 |
|---|---|---|---|---|
| 14.5 gal | Premium | $5.28 | $76.56 | $57.42 |
By region, 14.5-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $71.48 |
| Midwest | $5.37 | $77.86 |
| Gulf CoastLowest | $4.57 | $66.27 |
| Rocky Mountain | $5.12 | $74.24 |
| West Coast | $6.08 | $88.16 |
| CaliforniaHighest | $6.36 | $92.22 |
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
- 14.5-gallon tank$76.56
- A year of driving (15,000 mi)$3,168
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
S3 tank size in other years
The 2018 S3 uses the same 14.5 gal tank as every S3 since 2016.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2024 S3 | 14.5 gal | 464 mi |
| 2023 S3 | 14.5 gal | 464 mi |
| 2022 S3 | 14.5 gal | 464 mi |
| 2020 S3 | 14.5 gal | 421 mi |
| 2019 S3 | 14.5 gal | 421 mi |
| 2018 S3 | 14.5 gal | 406 mi |
| 2017 S3 | 14.5 gal | 406 mi |
| 2016 S3 | 14.5 gal | 450 mi |
2018 Audi S3 vs similar 2018 sedans
The S3 has the smallest tank of the seven 2018 sedans compared here: 14.5 gallons, against 17.8 for the Volvo S60.
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Volvo S60 | 17.8 gal | 641 mi |
| Lexus IS 300 | 17.4 gal | 557 mi |
| Jaguar XE | 14.8–16.6 gal | 622 mi |
| Cadillac ATS | 16.0 gal | 496 mi |
| BMW M3 CS | 15.9 gal | 350 mi |
| Mercedes-Benz CLA-Class | 14.8 gal | 548 mi |
| Audi S3 | 14.5 gal | 406 mi |
Other 2018 sedans of a similar size, one model per brand.
2018 Audi S3 fuel system recalls
None of the 1 recall NHTSA lists for the 2018 Audi S3 involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2018 Audi S3?
The 2018 Audi S3 holds 14.5 gallons (55 liters) on every trim we list.
How many gallons and liters does the 2018 Audi S3 gas tank hold?
The 2018 Audi S3 tank holds 55 liters, or 14.5 gallons in US gallons.
How far can a 2018 Audi S3 go on a full tank?
About 406 miles on the highway and 319 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 Audi S3 go on a quarter tank?
About 102 highway miles or 80 in town from the 14.5-gallon tank, which has roughly 3.6 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 Audi S3 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 Audi S3?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 14.5-gallon tank from empty costs $76.56. It ranges from $66.27 in the Gulf Coast to $92.22 in California.
How much does a full tank of gas weigh in a 2018 Audi S3?
About 90 pounds for the 14.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Audi S3 have a bigger gas tank than the Cadillac ATS?
No. The 2018 Cadillac ATS holds up to 16.0 gallons; the 2018 Audi S3 holds up to 14.5.
Has the 2018 Audi S3 had a fuel pump or fuel system recall?
No. None of the 1 recall NHTSA lists for the 2018 Audi S3 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 (Audi 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.