A Jeep Grand Cherokee holds 18-24 gallons depending on the model year and engine.
The Jeep Grand Cherokee's fuel tank capacity ranges from 18.6 gallons (70.4 liters) in older models to 24.6 gallons (93.1 liters) in newer, high-performance trims. Diesel and V8 engines typically have larger tanks, while standard V6 models hold closer to 18-20 gallons. Always check your owner's manual for exact specs.
Fuel Tank Capacity by Engine Type
- 3.6L V6 (Standard): ~18.6-20.5 gallons
- 5.7L V8 (HEMI): ~21.5-24.6 gallons
- 3.0L Diesel: ~24.6 gallons (largest capacity)
- Hybrid/4xe Models: ~17.2 gallons (smaller due to battery space)
How Fuel Tank Size Affects Driving Range
| Engine Type | Tank Size (Gallons) | Avg. MPG (City/Hwy) | Estimated Range (Miles) |
|---|---|---|---|
| 3.6L V6 | 18.6 | 19/26 | 350-480 |
| 5.7L V8 | 24.6 | 14/22 | 340-540 |
| 3.0L Diesel | 24.6 | 21/29 | 520-710 |
| 4xe Hybrid | 17.2 | 23/24 (gas-only) | 400+ (with electric assist) |
How to Check Your Exact Capacity
- Owner's Manual: Look under "Specifications" or "Fuel System."
- Fuel Door Sticker: Some models list capacity near the fuel type label.
- Digital Dash: Modern Grand Cherokees may display range estimates based on tank size.
- Online VIN Decoder: Enter your VIN for precise vehicle details.
Why Tank Size Varies
- Engine Demand: Larger engines (V8/diesel) need more fuel for power, requiring bigger tanks.
- Weight Distribution: Off-road trims (e.g., Trailhawk) may optimize tank placement for balance.
- Hybrid Trade-offs: Battery packs reduce space, shrinking tank size in 4xe models.
- Model Year Updates: Newer generations often adjust capacity for efficiency or emissions standards.
Common Misconceptions
- "All Grand Cherokees hold 20 gallons." → False; varies by trim and year.
- "Diesel tanks are smaller." → False; diesel models often have the largest tanks.
- "Reserve fuel is 1-2 gallons." → Varies; most warn when ~10-15% remains (2-3 gallons in a 20-gallon tank).