2018 BMW M3 Gas Tank Size & Fuel Capacity
Fuel tank capacity
15.8gal · 60 L
The 2018 BMW M3 has a fuel tank capacity of 15.8 gallons (60 liters).
A full tank is good for roughly 395 highway miles or 269 miles around town, going by the EPA ratings.
15.8 gal · Smaller than 71% of 2018 models we list.
Listed separately: 2018 BMW M3 CS (15.9 gal).
2018 BMW M3 fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 4dr Sedan 3.0L 6cyl Turbo 6M · RWD MPG 17 / 25Range 269 / 395 mi | 3.0L 6cyl Turbo 6M | RWD | 15.8 gal60 L | 17 / 25 | 269 / 395 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 BMW M3 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 20 MPG, a full 15.8-gallon tank covers about 316 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 15.8 | 395 | 269 |
| 3/4 | 11.9 | 296 | 201 |
| 1/2 | 7.9 | 198 | 134 |
| 1/4 | 4.0 | 99 | 67 |
| 1/8 | 2.0 | 49 | 34 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 750 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
- 20 MPG
- Tailpipe CO2
- 439 g/mi
- EPA greenhouse score
- 4 of 10
- Source
- EPA ratings
What it costs to fill up a 2018 BMW M3
$83.42 to fill the 15.8-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 |
|---|---|---|---|---|
| 15.8 gal | Premium | $5.28 | $83.42 | $62.57 |
By region, 15.8-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $77.89 |
| Midwest | $5.37 | $84.85 |
| Gulf CoastLowest | $4.57 | $72.21 |
| Rocky Mountain | $5.12 | $80.90 |
| West Coast | $6.08 | $96.06 |
| CaliforniaHighest | $6.36 | $100.49 |
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
- 15.8-gallon tank$83.42
- A year of driving (15,000 mi)$3,960
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
M3 tank size in other years
The 2018 M3 uses the same 15.8 gal tank as every M3 since 2015.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2025 M3 | 15.6 gal | 359 mi |
| 2024 M3 | 15.6 gal | 359 mi |
| 2023 M3 | 15.6 gal | 359 mi |
| 2022 M3 | 15.6 gal | 359 mi |
| 2021 M3 | 15.6 gal | 359 mi |
| 2018 M3 | 15.8 gal | 395 mi |
| 2017 M3 | 15.8 gal | 411 mi |
| 2016 M3 | 15.8 gal | 411 mi |
| 2015 M3 | 15.8 gal | 411 mi |
| 2013 M3 | 16.6 gal | 332 mi |
| 2012 M3 | 16.6 gal | 332 mi |
- 2027
- 2026
- 2025
- 2024
- 2023
- 2022
- 2021
- 2018
- 2017
- 2016
- 2015
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2006
- 2005
- 2004
- 2003
- 2002
- 2001
- 1998
- 1997
- 1996
- 1995
- 1991
- 1990
2018 BMW M3 vs similar 2018 sedans
At 15.8 gallons, the M3's largest tank ranks sixth of the seven 2018 sedans compared here. The Volvo S60 carries the most (17.8 gal) and the Audi A4 the least (15.3 gal).
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Volvo S60 | 17.8 gal | 641 mi |
| Lexus IS 300 | 17.4 gal | 557 mi |
| Acura TLX | 17.2 gal | 568 mi |
| Jaguar XE | 14.8–16.6 gal | 622 mi |
| Cadillac ATS | 16.0 gal | 496 mi |
| BMW M3 | 15.8 gal | 395 mi |
| Audi A4 | 15.3 gal | 566 mi |
Other 2018 sedans of a similar size, one model per brand.
Frequently asked questions
What is the fuel tank capacity of the 2018 BMW M3?
The 2018 BMW M3 holds 15.8 gallons (60 liters).
How many gallons and liters does the 2018 BMW M3 gas tank hold?
The 2018 BMW M3 tank holds 60 liters, or 15.8 gallons in US gallons.
How far can a 2018 BMW M3 go on a full tank?
About 395 miles on the highway and 269 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 BMW M3 go on a quarter tank?
About 99 highway miles or 67 in town from the 15.8-gallon tank, which has roughly 4.0 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 BMW M3 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 BMW M3?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 15.8-gallon tank from empty costs $83.42. It ranges from $72.21 in the Gulf Coast to $100.49 in California.
How much does a full tank of gas weigh in a 2018 BMW M3?
About 98 pounds for the 15.8-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 BMW M3 have a bigger gas tank than the Audi A4?
Yes. The 2018 BMW M3 holds up to 15.8 gallons; the 2018 Audi A4 holds up to 15.3.
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).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.