2020 Audi S6 Gas Tank Size & Fuel Capacity
Fuel tank capacity
19.3gal · 73 L
The 2020 Audi S6 has a fuel tank capacity of 19.3 gallons (73 liters) on every trim.
A full tank is good for roughly 540 highway miles or 347 miles around town, going by the EPA ratings.
19.3 gal · Bigger than 63% of 2020 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- FAQ
2020 Audi S6 fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| Premium Plus 4dr Sedan AWD 2.9L 6cyl Twincharger mild hybrid 8A · AWD MPG 18 / 28Range 347 / 540 mi | 2.9L 6cyl Twincharger mild hybrid 8A | AWD | 19.3 gal73 L | 18 / 28 | 347 / 540 mi | |
| Prestige 4dr Sedan AWD 2.9L 6cyl Twincharger mild hybrid 8A · AWD MPG 18 / 28Range 347 / 540 mi | 2.9L 6cyl Twincharger mild hybrid 8A | AWD | 19.3 gal73 L | 18 / 28 | 347 / 540 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 2020 Audi S6 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 22 MPG, a full 19.3-gallon tank covers about 425 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 19.3 | 540 | 347 |
| 3/4 | 14.5 | 405 | 261 |
| 1/2 | 9.7 | 270 | 174 |
| 1/4 | 4.8 | 135 | 87 |
| 1/8 | 2.4 | 68 | 43 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 682 gallons, roughly 35 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.
What it costs to fill up a 2020 Audi S6
$101.90 to fill the 19.3-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 |
|---|---|---|---|---|
| 19.3 gal | Premium | $5.28 | $101.90 | $76.43 |
By region, 19.3-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $95.15 |
| Midwest | $5.37 | $103.64 |
| Gulf CoastLowest | $4.57 | $88.20 |
| Rocky Mountain | $5.12 | $98.82 |
| West Coast | $6.08 | $117.34 |
| CaliforniaHighest | $6.36 | $122.75 |
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
- 19.3-gallon tank$101.90
- A year of driving (15,000 mi)$3,600
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
S6 tank size in other years
The tank changed for 2020: 19.3 gal, down from 19.8 gal on the 2018 S6.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2025 S6 | 19.3 gal | 521 mi |
| 2024 S6 | 19.3 gal | 502 mi |
| 2023 S6 | 19.3 gal | 502 mi |
| 2022 S6 | 19.3 gal | 540 mi |
| 2021 S6 | 19.3 gal | 540 mi |
| 2020 S6 | 19.3 gal | 540 mi |
| 2018 S6 | 19.8 gal | 475 mi |
| 2017 S6 | 19.8 gal | 535 mi |
| 2016 S6 | 19.8 gal | 535 mi |
| 2015 S6 | 19.8 gal | 535 mi |
| 2014 S6 | 19.8 gal | 535 mi |
2020 Audi S6 vs similar 2020 sedans
At 19.3 gallons, the S6's largest tank ranks fifth of the seven 2020 sedans compared here. The Porsche Panamera carries the most (23.7 gal) and the Lincoln Continental the least (18.0 gal).
| 2020 model | Tank | Longest highway range |
|---|---|---|
| Porsche Panamera | 21.1–23.7 gal | 640 mi |
| Mercedes-Benz E-Class | 17.4–21.1 gal | 591 mi |
| Genesis G80 | 20.3 gal | 528 mi |
| BMW M5 | 20.1 gal | 422 mi |
| Audi S6 | 19.3 gal | 540 mi |
| Acura RLX | 15.1–18.5 gal | 537 mi |
| Lincoln Continental | 18.0 gal | 486 mi |
Other 2020 sedans of a similar size, one model per brand.
2020 Audi S6 fuel system recalls
None of the 6 recalls NHTSA lists for the 2020 Audi S6 involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2020 Audi S6?
The 2020 Audi S6 holds 19.3 gallons (73 liters) on every trim we list.
How many gallons and liters does the 2020 Audi S6 gas tank hold?
The 2020 Audi S6 tank holds 73 liters, or 19.3 gallons in US gallons.
How far can a 2020 Audi S6 go on a full tank?
About 540 miles on the highway and 347 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 2020 Audi S6 go on a quarter tank?
About 135 highway miles or 87 in town from the 19.3-gallon tank, which has roughly 4.8 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2020 Audi S6 take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2020 Audi S6?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 19.3-gallon tank from empty costs $101.90. It ranges from $88.20 in the Gulf Coast to $122.75 in California.
How much does a full tank of gas weigh in a 2020 Audi S6?
About 120 pounds for the 19.3-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2020 Audi S6 have a bigger gas tank than the Genesis G80?
No. The 2020 Genesis G80 holds up to 20.3 gallons; the 2020 Audi S6 holds up to 19.3.
Has the 2020 Audi S6 had a fuel pump or fuel system recall?
No. None of the 6 recalls NHTSA lists for the 2020 Audi S6 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. 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.