2018 Ram 2500 Gas Tank Size & Fuel Capacity
Fuel tank capacity
31.0–32.0gal · 117–121 L
The 2018 Ram 2500 has a fuel tank capacity of 31.0 to 32.0 gallons (117–121 liters), depending on the trim. The most common size is 31.0 gallons, used on 27 trims.
32.0 gal · Bigger than 96% of 2018 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- Pump & gauge parts
- FAQ
2018 Ram 2500 fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- no difference
- Cab
- Bed
- Engine
- no difference
All 45 trims
| Trim | Engine | Drive | Tank | |||
|---|---|---|---|---|---|---|
| Big Horn 4dr Crew Cab 4WD SB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Big Horn 4dr Crew Cab SB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Big Horn 4dr Mega Cab 4WD SB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Big Horn 4dr Mega Cab SB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Laramie 4dr Crew Cab 4WD SB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Laramie 4dr Crew Cab SB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Laramie 4dr Mega Cab 4WD SB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Laramie 4dr Mega Cab SB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Limited 4dr Crew Cab 4WD SB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Limited 4dr Crew Cab SB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Limited 4dr Mega Cab 4WD SB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Limited 4dr Mega Cab SB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Lone Star 4dr Crew Cab 4WD SB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Lone Star 4dr Crew Cab SB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Lone Star 4dr Mega Cab 4WD SB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Lone Star 4dr Mega Cab SB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Longhorn 4dr Crew Cab 4WD SB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Longhorn 4dr Crew Cab SB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Longhorn 4dr Mega Cab 4WD SB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Longhorn 4dr Mega Cab SB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Power Wagon 4dr Crew Cab 4WD SB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| SLT 4dr Crew Cab 4WD SB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| SLT 4dr Crew Cab SB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 31.0 gal117 L | |||
| SLT 4dr Mega Cab 4WD SB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| SLT 4dr Mega Cab SB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Tradesman 4dr Crew Cab 4WD SB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 31.0 gal117 L | |||
| Tradesman 4dr Crew Cab SB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 31.0 gal117 L | |||
| Big Horn 4dr Crew Cab 4WD LB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| Big Horn 4dr Crew Cab LB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 32.0 gal121 L | |||
| Laramie 4dr Crew Cab 4WD LB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| Laramie 4dr Crew Cab LB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 32.0 gal121 L | |||
| Limited 4dr Crew Cab 4WD LB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| Limited 4dr Crew Cab LB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 32.0 gal121 L | |||
| Lone Star 4dr Crew Cab 4WD LB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| Lone Star 4dr Crew Cab LB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 32.0 gal121 L | |||
| Longhorn 4dr Crew Cab 4WD LB 6.4L 8cyl 6A · 4WD | 6.4L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| Longhorn 4dr Crew Cab LB 6.4L 8cyl 6A · RWD | 6.4L 8cyl 6A | RWD | 32.0 gal121 L | |||
| SLT 2dr Regular Cab 4WD LB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| SLT 2dr Regular Cab LB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 32.0 gal121 L | |||
| SLT 4dr Crew Cab 4WD LB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| SLT 4dr Crew Cab LB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 32.0 gal121 L | |||
| Tradesman 2dr Regular Cab 4WD LB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| Tradesman 2dr Regular Cab LB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 32.0 gal121 L | |||
| Tradesman 4dr Crew Cab 4WD LB 5.7L 8cyl 6A · 4WD | 5.7L 8cyl 6A | 4WD | 32.0 gal121 L | |||
| Tradesman 4dr Crew Cab LB 5.7L 8cyl 6A · RWD | 5.7L 8cyl 6A | RWD | 32.0 gal121 L | |||
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. The EPA doesn't rate fuel economy for heavy-duty pickups and vans (over 8,500 lb gross vehicle weight), so these trims have no official MPG or range.
What it costs to fill up a 2018 Ram 2500
$132.37 to fill the 31.0-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 |
|---|---|---|---|---|
| 31.0 gal | Regular | $4.27 | $132.37 | $99.28 |
| 32.0 gal | Regular | $4.27 | $136.64 | $102.48 |
By region, 31.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $124.62 |
| Midwest | $4.27 | $132.37 |
| Gulf CoastLowest | $3.70 | $114.70 |
| Rocky Mountain | $4.46 | $138.26 |
| West Coast | $5.42 | $168.02 |
| CaliforniaHighest | $5.89 | $182.59 |
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
- 31.0-gallon tank$132.37
- 32.0-gallon tank$136.64
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
2500 tank size in other years
The 2018 2500 uses the same 31.0–32.0 gal tank sizes as every 2500 since 2013.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2024 2500 | 31.0–32.0 gal | Not rated |
| 2023 2500 | 31.0–32.0 gal | Not rated |
| 2022 2500 | 31.0–32.0 gal | Not rated |
| 2021 2500 | 31.0–32.0 gal | Not rated |
| 2019 2500 | 31.0–32.0 gal | Not rated |
| 2018 2500 | 31.0–32.0 gal | Not rated |
| 2017 2500 | 31.0–32.0 gal | Not rated |
| 2016 2500 | 31.0–32.0 gal | Not rated |
| 2015 2500 | 31.0–32.0 gal | Not rated |
| 2014 2500 | 31.0–32.0 gal | Not rated |
| 2013 2500 | 31.0–32.0 gal | Not rated |
2018 Ram 2500 vs similar 2018 pickups
At 32.0 gallons, the 2500's largest tank ranks fourth of the five 2018 pickups compared here. The Ford F-350 Super Duty carries the most (48.0 gal) and the Nissan Titan XD the least (26.0 gal).
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Ford F-350 Super Duty | 34.0–48.0 gal | Not rated |
| Chevrolet Silverado 3500HD | 36.0 gal | Not rated |
| GMC Sierra 3500HD | 36.0 gal | Not rated |
| Ram 2500 | 31.0–32.0 gal | Not rated |
| Nissan Titan XD | 26.0 gal | 546 mi |
Other 2018 pickups of a similar size, one model per brand.
2018 Ram 2500 fuel system recalls
None of the 9 recalls NHTSA lists for the 2018 Ram 2500 involve the fuel system.
2018 Ram 2500 fuel pump and gauge parts
NHTSA lists no fuel-system recall for the 2018 Ram 2500, so a failed pump or gauge is a normal repair. These are the part numbers the makers list for it.
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Frequently asked questions
What is the fuel tank capacity of the 2018 Ram 2500?
The 2018 Ram 2500 holds between 31.0 and 32.0 gallons, depending on the trim. 31.0 gallons is the usual size; the 32.0-gallon tank comes on the Big Horn 4dr Crew Cab 4WD LB (5.7L 8cyl 6A).
How many gallons and liters does the 2018 Ram 2500 gas tank hold?
The 2018 Ram 2500 tank holds 117–121 liters, or 31.0–32.0 gallons in US gallons.
Which 2018 Ram 2500 has the biggest gas tank?
The 32.0-gallon tank is on the Big Horn 4dr Crew Cab 4WD LB, Big Horn 4dr Crew Cab LB, Laramie 4dr Crew Cab 4WD LB and 15 other trims. The smallest tank, 31.0 gallons, is on the Big Horn 4dr Crew Cab 4WD SB.
Does 4WD change the 2018 Ram 2500 gas tank?
No. 4WD and RWD versions of the 2018 Ram 2500 use the same 31.0–32.0 gal tank.
What gas does the 2018 Ram 2500 take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Ram 2500?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 31.0-gallon tank from empty costs $132.37. It ranges from $114.70 in the Gulf Coast to $182.59 in California.
How much does a full tank of gas weigh in a 2018 Ram 2500?
About 198 pounds for the 32.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Ram 2500 have a bigger gas tank than the Chevrolet Silverado 3500HD?
No. The 2018 Chevrolet Silverado 3500HD holds up to 36.0 gallons; the 2018 Ram 2500 holds up to 32.0.
Has the 2018 Ram 2500 had a fuel pump or fuel system recall?
No. None of the 9 recalls NHTSA lists for the 2018 Ram 2500 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 (Ram 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.