How many miles per gallon does a 2500 diesel get?
The typical answer is that a 2500-class diesel pickup averages roughly 17–20 miles per gallon combined, with highway numbers often in the low 20s when unloaded. Real-world results vary widely based on towing, payload, and driving style.
Diesel-powered 2500 pickups—from brands like Ram, Ford, and General Motors—are engineered for torque and towing rather than outright fuel economy. EPA estimates provide a baseline across city and highway driving, but actual results can differ significantly depending on year, engine, drivetrain, gear ratio, and how the vehicle is used (towing a trailer, carrying a heavy load, or simply cruising on highways).
Typical mpg ranges for 2500 diesels
Here are typical mpg ranges you can expect for 2500-class diesel pickups, based on EPA estimates and owner data. Ranges vary by year, engine, drivetrain, and payload.
- Combined mpg: about 17–20 miles per gallon
- Highway mpg: about 20–23 miles per gallon when lightly loaded
- City mpg: about 12–15 miles per gallon
- With heavy towing or payload: often 9–13 miles per gallon
These figures illustrate the general spread you’ll encounter. The exact numbers for your truck depend on model year, drivetrain, gear ratio, and how you use the vehicle.
Factors that influence mpg
Several variables influence diesel 2500 mpg beyond the base engine. The following factors typically have the biggest impact.
- Payload and towing: Additional weight lowers efficiency, especially under heavy load.
- Drivetrain configuration: 4x4 and lower axle ratios can reduce mpg versus 2WD and higher gearing.
- Tire size and condition: Larger tires and underinflated tires increase rolling resistance and reduce mpg.
- Aerodynamics: Bed covers, racks, and other accessories can affect highway efficiency.
- Driving style and speed: Aggressive acceleration and sustained high speeds lower mpg.
- Maintenance and fuel quality: Clogged air filters, dirty injectors, and poor maintenance can reduce efficiency.
In practice, careful towing practices, proper maintenance, and efficient driving can push mpg toward the upper end of these ranges, though significant payloads or towing will usually keep numbers lower.
Summary
For a 2500-class diesel pickup, expect roughly 17–20 mpg combined on typical use, with highway efficiency around the low 20s when unloaded. Real-world results vary with payload, towing, terrain, and driving style. For the most accurate benchmark, check the EPA rating for your exact model year and configuration and compare it to your own driving patterns.
