2018 BMW 4 Series Gran Coupe Gas Tank Size & Fuel Capacity
Fuel tank capacity
15.8gal · 60 L
The 2018 BMW 4 Series Gran Coupe has a fuel tank capacity of 15.8 gallons (60 liters) on every trim.
A full tank is good for roughly 490–537 highway miles or 332–379 miles around town, going by the EPA ratings.
15.8 gal · Smaller than 71% of 2018 models we list.
Listed separately: 2018 BMW 4 Series (15.8 gal).
2018 BMW 4 Series Gran Coupe fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- no difference
- Engine
- no difference
All 4 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 430i 4dr Sedan 2.0L 4cyl Turbo 8A · RWD MPG 24 / 34Range 379 / 537 mi | 2.0L 4cyl Turbo 8A | RWD | 15.8 gal60 L | 24 / 34 | 379 / 537 mi | |
| 430i xDrive 4dr Sedan AWD 2.0L 4cyl Turbo 8A · AWD MPG 23 / 33Range 363 / 521 mi | 2.0L 4cyl Turbo 8A | AWD | 15.8 gal60 L | 23 / 33 | 363 / 521 mi | |
| 440i 4dr Sedan 3.0L 6cyl Turbo 8A · RWD MPG 21 / 32Range 332 / 506 mi | 3.0L 6cyl Turbo 8A | RWD | 15.8 gal60 L | 21 / 32 | 332 / 506 mi | |
| 440i xDrive 4dr Sedan AWD 3.0L 6cyl Turbo 8A · AWD MPG 21 / 31Range 332 / 490 mi | 3.0L 6cyl Turbo 8A | AWD | 15.8 gal60 L | 21 / 31 | 332 / 490 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 4 Series Gran Coupe 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 27 MPG, a full 15.8-gallon tank covers about 427 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 15.8 | 537 | 379 |
| 3/4 | 11.9 | 403 | 284 |
| 1/2 | 7.9 | 269 | 190 |
| 1/4 | 4.0 | 134 | 95 |
| 1/8 | 2.0 | 67 | 47 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 556 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 2018 BMW 4 Series Gran Coupe
$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)$2,933
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
4 Series Gran Coupe tank size in other years
The 2018 4 Series Gran Coupe uses the same 15.8 gal tank as every 4 Series Gran Coupe since 2015.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2024 4 Series Gran Coupe | 15.6 gal | 530 mi |
| 2023 4 Series Gran Coupe | 15.6 gal | 530 mi |
| 2022 4 Series Gran Coupe | 15.6 gal | 530 mi |
| 2020 4 Series Gran Coupe | 15.8 gal | 537 mi |
| 2019 4 Series Gran Coupe | 15.8 gal | 537 mi |
| 2018 4 Series Gran Coupe | 15.8 gal | 537 mi |
| 2017 4 Series Gran Coupe | 15.8 gal | 537 mi |
| 2016 4 Series Gran Coupe | 15.8 gal | 537 mi |
| 2015 4 Series Gran Coupe | 15.8 gal | 537 mi |
2018 BMW 4 Series Gran Coupe vs similar 2018 sedans
At 15.8 gallons, the 4 Series Gran Coupe's largest tank ranks sixth of the seven 2018 sedans compared here. The INFINITI Q50 carries the most (20.0 gal) and the Audi S4 the least (15.3 gal).
| 2018 model | Tank | Longest highway range |
|---|---|---|
| INFINITI Q50 | 17.8–20.0 gal | 600 mi |
| Volvo S60 Cross Country | 17.8 gal | 534 mi |
| Lexus IS 300 | 17.4 gal | 557 mi |
| Mercedes-Benz C-Class | 13.2–17.4 gal | 574 mi |
| Acura TLX | 17.2 gal | 568 mi |
| BMW 4 Series Gran Coupe | 15.8 gal | 537 mi |
| Audi S4 | 15.3 gal | 459 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 4 Series Gran Coupe?
The 2018 BMW 4 Series Gran Coupe holds 15.8 gallons (60 liters) on every trim we list.
How many gallons and liters does the 2018 BMW 4 Series Gran Coupe gas tank hold?
The 2018 BMW 4 Series Gran Coupe tank holds 60 liters, or 15.8 gallons in US gallons.
Does AWD change the 2018 BMW 4 Series Gran Coupe gas tank?
No. RWD and AWD versions of the 2018 BMW 4 Series Gran Coupe use the same 15.8 gal tank.
How far can a 2018 BMW 4 Series Gran Coupe go on a full tank?
About 490–537 miles on the highway and 332–379 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 4 Series Gran Coupe go on a quarter tank?
About 134 highway miles or 95 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 4 Series Gran Coupe take?
Premium unleaded (recommended). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 BMW 4 Series Gran Coupe?
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 4 Series Gran Coupe?
About 98 pounds for the 15.8-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 BMW 4 Series Gran Coupe have a bigger gas tank than the Volvo S60 Cross Country?
No. The 2018 Volvo S60 Cross Country holds up to 17.8 gallons; the 2018 BMW 4 Series Gran Coupe holds up to 15.8.
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).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.