2018 Audi RS 5 Gas Tank Size & Fuel Capacity
Fuel tank capacity
15.3gal · 58 L
The 2018 Audi RS 5 has a fuel tank capacity of 15.3 gallons (58 liters).
A full tank is good for roughly 398 highway miles or 275 miles around town, going by the EPA ratings.
15.3 gal · Smaller than 75% of 2018 models we list.
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2018 Audi RS 5 fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| quattro 2dr Coupe AWD 2.9L 6cyl Turbo 8A · AWD MPG 18 / 26Range 275 / 398 mi | 2.9L 6cyl Turbo 8A | AWD | 15.3 gal58 L | 18 / 26 | 275 / 398 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 RS 5 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 21 MPG, a full 15.3-gallon tank covers about 321 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 15.3 | 398 | 275 |
| 3/4 | 11.5 | 298 | 207 |
| 1/2 | 7.7 | 199 | 138 |
| 1/4 | 3.8 | 99 | 69 |
| 1/8 | 1.9 | 50 | 34 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 714 gallons, roughly 47 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
- 21 MPG
- Tailpipe CO2
- 419 g/mi
- EPA greenhouse score
- 4 of 10
- Source
- EPA ratings
What it costs to fill up a 2018 Audi RS 5
$80.78 to fill the 15.3-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 |
|---|---|---|---|---|
| 15.3 gal | Premium | $5.28 | $80.78 | $60.59 |
By region, 15.3-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $75.43 |
| Midwest | $5.37 | $82.16 |
| Gulf CoastLowest | $4.57 | $69.92 |
| Rocky Mountain | $5.12 | $78.34 |
| West Coast | $6.08 | $93.02 |
| CaliforniaHighest | $6.36 | $97.31 |
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
- 15.3-gallon tank$80.78
- A year of driving (15,000 mi)$3,771
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
RS 5 tank size in other years
The tank changed for 2018: 15.3 gal, down from 16.1 gal on the 2015 RS 5.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2024 RS 5 | 15.3 gal | 383 mi |
| 2023 RS 5 | 15.3 gal | 398 mi |
| 2022 RS 5 | 15.3 gal | 383 mi |
| 2021 RS 5 | 15.3 gal | 383 mi |
| 2019 RS 5 | 15.3 gal | 413 mi |
| 2018 RS 5 | 15.3 gal | 398 mi |
| 2015 RS 5 | 16.1 gal | 370 mi |
| 2014 RS 5 | 16.1 gal | 370 mi |
| 2013 RS 5 | 16.1 gal | 370 mi |
2018 Audi RS 5 vs similar 2018 coupes
The RS 5 has the smallest tank of the five 2018 coupes compared here: 15.3 gallons, against 20.0 for the INFINITI Q60.
| 2018 model | Tank | Longest highway range |
|---|---|---|
| INFINITI Q60 | 20.0 gal | 600 mi |
| Mercedes-Benz AMG® GT | 19.8 gal | 436 mi |
| Lexus RC F | 17.4 gal | 435 mi |
| Cadillac ATS-V | 16.0 gal | 368 mi |
| Audi RS 5 | 15.3 gal | 398 mi |
Other 2018 coupes of a similar size, one model per brand.
2018 Audi RS 5 fuel system recalls
None of the 3 recalls NHTSA lists for the 2018 Audi RS 5 involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2018 Audi RS 5?
The 2018 Audi RS 5 holds 15.3 gallons (58 liters).
How many gallons and liters does the 2018 Audi RS 5 gas tank hold?
The 2018 Audi RS 5 tank holds 58 liters, or 15.3 gallons in US gallons.
How far can a 2018 Audi RS 5 go on a full tank?
About 398 miles on the highway and 275 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 RS 5 go on a quarter tank?
About 99 highway miles or 69 in town from the 15.3-gallon tank, which has roughly 3.8 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 Audi RS 5 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 RS 5?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 15.3-gallon tank from empty costs $80.78. It ranges from $69.92 in the Gulf Coast to $97.31 in California.
How much does a full tank of gas weigh in a 2018 Audi RS 5?
About 95 pounds for the 15.3-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Audi RS 5 have a bigger gas tank than the Lexus RC F?
No. The 2018 Lexus RC F holds up to 17.4 gallons; the 2018 Audi RS 5 holds up to 15.3.
Has the 2018 Audi RS 5 had a fuel pump or fuel system recall?
No. None of the 3 recalls NHTSA lists for the 2018 Audi RS 5 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.