1998 BMW M Gas Tank Size & Fuel Capacity
Fuel tank capacity
13.5gal · 51 L
The 1998 BMW M has a fuel tank capacity of 13.5 gallons (51 liters).
A full tank is good for roughly 351 highway miles or 243 miles around town, going by the EPA ratings.
13.5 gal · Smaller than 92% of 1998 models we list.
1998 BMW M fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 2dr Convertible 3.2L 6cyl 5M · RWD MPG 18 / 26Range 243 / 351 mi | 3.2L 6cyl 5M | RWD | 13.5 gal51 L | 18 / 26 | 243 / 351 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 1998 BMW M 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 13.5-gallon tank covers about 284 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 13.5 | 351 | 243 |
| 3/4 | 10.1 | 263 | 182 |
| 1/2 | 6.8 | 176 | 122 |
| 1/4 | 3.4 | 88 | 61 |
| 1/8 | 1.7 | 44 | 30 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 714 gallons, roughly 53 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
- 423 g/mi
- Source
- EPA ratings
What it costs to fill up a 1998 BMW M
$57.64 to fill the 13.5-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 13.5 gal | Regular | $4.27 | $57.64 | $43.23 |
By region, 13.5-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $54.27 |
| Midwest | $4.27 | $57.64 |
| Gulf CoastLowest | $3.70 | $49.95 |
| Rocky Mountain | $4.46 | $60.21 |
| West Coast | $5.42 | $73.17 |
| CaliforniaHighest | $5.89 | $79.52 |
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
- 13.5-gallon tank$57.64
- A year of driving (15,000 mi)$3,050
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
M tank size in other years
1998 is the first M model year we list.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2006 M | 14.5 gal | 319 mi |
| 2002 M | 16.6 gal | 415 mi |
| 2001 M | 16.6 gal | 382 mi |
| 2000 M | 13.5 gal | 311 mi |
| 1999 M | 13.5 gal | 324 mi |
| 1998 M | 13.5 gal | 351 mi |
1998 BMW M vs similar 1998 convertibles
The M has the smallest tank of the two 1998 convertibles compared here: 13.5 gallons, against 14.0 for the Mercedes-Benz SLK-Class.
| 1998 model | Tank | Longest highway range |
|---|---|---|
| Mercedes-Benz SLK-Class | 14.0 gal | Not rated |
| BMW M | 13.5 gal | 351 mi |
Other 1998 convertibles of a similar size, one model per brand.
Frequently asked questions
What is the fuel tank capacity of the 1998 BMW M?
The 1998 BMW M holds 13.5 gallons (51 liters).
How many gallons and liters does the 1998 BMW M gas tank hold?
The 1998 BMW M tank holds 51 liters, or 13.5 gallons in US gallons.
How far can a 1998 BMW M go on a full tank?
About 351 miles on the highway and 243 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 1998 BMW M go on a quarter tank?
About 88 highway miles or 61 in town from the 13.5-gallon tank, which has roughly 3.4 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 1998 BMW M take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 1998 BMW M?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 13.5-gallon tank from empty costs $57.64. It ranges from $49.95 in the Gulf Coast to $79.52 in California.
How much does a full tank of gas weigh in a 1998 BMW M?
About 84 pounds for the 13.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 1998 BMW M have a bigger gas tank than the Mercedes-Benz SLK-Class?
No. The 1998 Mercedes-Benz SLK-Class holds up to 14.0 gallons; the 1998 BMW M holds up to 13.5.
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.