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 Dodge Grand Caravan 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 20.0-gallon tank covers about 400 miles.
Gauge
Gallons
Highway miles
City miles
Full
20.0
500
340
3/4
15.0
375
255
1/2
10.0
250
170
1/4
5.0
125
85
1/8
2.5
63
43
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 750 gallons, roughly 38 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.
At 20.0 gallons, the Grand Caravan's largest tank ranks second of the five 2018 minivans compared here. The Kia Sedona carries the most (21.1 gal) and the Chrysler Pacifica the least (19.0 gal).
Other 2018 minivans of a similar size, one model per brand.
2018 Dodge Grand Caravan fuel system recalls
NHTSA lists 1 fuel-system recall for the 2018 Dodge Grand Caravan, out of 4 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.
Vantage Mobility International, LLC (Vantage) is recalling certain Vantage-modified 2016-2019 Dodge Grand Caravan vehicles. The fuel pump gasket may deteriorate, allowing fuel to leak.
Risk and remedy
Risk: A fuel leak in the presence of an ignition source can increase the risk of a fire.
Remedy: Vantage will notify owners, and will provide parts and reimbursement to owners for repair facilities to replace the fuel tank gasket, free of charge. The recall began May 19, 2020. Owners may contact Vantage customer service at 1-800-488-9082.
What is the fuel tank capacity of the 2018 Dodge Grand Caravan?
The 2018 Dodge Grand Caravan holds 20.0 gallons (76 liters) on every trim we list.
How many gallons and liters does the 2018 Dodge Grand Caravan gas tank hold?
The 2018 Dodge Grand Caravan tank holds 76 liters, or 20.0 gallons in US gallons.
How far can a 2018 Dodge Grand Caravan go on a full tank?
About 500 miles on the highway and 340 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 Dodge Grand Caravan go on a quarter tank?
About 125 highway miles or 85 in town from the 20.0-gallon tank, which has roughly 5.0 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 Dodge Grand Caravan take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Dodge Grand Caravan?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 20.0-gallon tank from empty costs $85.40. It ranges from $74.00 in the Gulf Coast to $117.80 in California.
How much does a full tank of gas weigh in a 2018 Dodge Grand Caravan?
About 124 pounds for the 20.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Dodge Grand Caravan have a bigger gas tank than the Kia Sedona?
No. The 2018 Kia Sedona holds up to 21.1 gallons; the 2018 Dodge Grand Caravan holds up to 20.0.
Has the 2018 Dodge Grand Caravan had a fuel pump or fuel system recall?
Yes. NHTSA lists 1 fuel-system recall for the 2018 Dodge Grand Caravan: 20V278000 (delivery · fuel pump). Check your VIN at nhtsa.gov/recalls to see if your car is affected.
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).