How many miles per gallon does a 2020 Ram 2500 4x4 diesel get?

The typical fuel economy for a 2020 Ram 2500 4x4 with the 6.7L Cummins diesel is about 15 mpg in city driving, 21 mpg on the highway, and roughly 17 mpg combined. The exact figure varies by configuration and driving conditions.

What you need to know: The Ram 2500's mpg depends on factors such as cab/bed configuration, wheel/tire size, payload, and towing. Official numbers come from the EPA (via fueleconomy.gov), and real-world results often differ from the labels depending on usage and terrain.

Official EPA estimates for 2020 Ram 2500 4x4 diesel

Below are the EPA-estimated fuel economy figures for common 4x4 diesel configurations of the 2020 Ram 2500. Note that exact numbers vary with cab style, bed length, and tire size.

• City: 15 mpg


• Highway: 21 mpg


• Combined: 17 mpg

These figures reflect standardized testing and are intended as a baseline. Real-world mileage may be higher or lower depending on setup and use.

Real-world factors that affect fuel economy

In everyday conditions, many factors influence actual mileage more than the EPA labels. Here are the key variables and typical ranges you might see.

• Payload and towing weight: Heavier loads significantly reduce mpg, especially in city driving and while climbing grades.


• Driving style and speed: Aggressive acceleration, high cruising speeds, and frequent braking lower efficiency.


• Tire size and condition: Larger or aggressive tires increase rolling resistance and can reduce mpg.


• Terrain and elevation: Hilly or mountainous routes reduce MPG compared with flat highways.


• Maintenance and engine condition: A well-maintained engine and clean air/filter systems help sustain efficiency.


• Fuel quality and grade: Use of the recommended diesel grade and clean fuel supports optimum performance.


• Weather and accessory use: Cold weather, idling, and added accessories (like bed covers or running lights) can affect mpg.

Real-world numbers typically range, with mixed driving often landing around the mid-teens while highway-only cruising can approach the low- to mid-20s under favorable conditions.

Tips to maximize fuel economy

Doable steps can help you get closer to the EPA figures and improve efficiency in daily use.

• Keep tires inflated to the manufacturer’s recommended pressures; under-inflation hurts economy and handling.


• Minimize payload and avoid unnecessary equipment that adds weight.


• Use cruise control on highways when appropriate to maintain steady speed.


• Plan routes to reduce stop-and-go driving; smooth acceleration and deceleration saves fuel.


• Tow with proper weight distribution and use tow/haul mode if available.


• Follow the maintenance schedule: replace air filters, keep oil clean, and use the correct fuel type.

While these tips help, the most accurate mileage comes from real-world driving under your typical use case.

Summary

For a 2020 Ram 2500 4x4 diesel, EPA estimates place city at about 15 mpg, highway at 21 mpg, and combined around 17 mpg. Real-world results depend on payload, towing, driving style, and configuration, but you can influence efficiency with mindful loading, maintenance, and driving habits.

How many miles per gallon does a 2020 Ram 2500 6.7 Cummins get?

The 2020 Ram 2500 with the 6.7L Cummins engine gets between 15 and 20 mpg depending on driving conditions, with highway driving averaging 17-20 mpg and city driving around 15 mpg. Fuel economy can vary significantly with factors like driving style, load, and towing; some owners report higher highway numbers (up to 22-23 mpg) when driving carefully, while towing can drop mileage to 10-12 mpg. 
Estimated MPG by driving condition

• Highway: 17–20 mpg
• City: ~15 mpg
• Towing: 10–12 mpg 

Factors that influence MPG

• Driving style: Aggressive acceleration and high speeds will decrease fuel economy.
• Load: Carrying heavy loads or towing significantly reduces MPG.
• Maintenance: Regular maintenance and proper tire inflation can help improve efficiency.
• Gearing: Different axle ratios can impact fuel economy. 

How many miles per gallon does a 2020 2500 diesel get?

Fuel Economy and Real-World MPG
The diesel Silverado 2500HD managed 19 mpg on the highway, and the Ram 2500 we last tested also earned 19 mpg.

How many miles per gallon does a 6.7 Cummins Ram 2500 get?

A 6.7L Cummins Ram 2500 gets an estimated 14-16 mpg in the city and 17-21 mpg on the highway, depending on the model year and specific configuration. Real-world fuel economy is often lower, especially with heavy towing, but many owners report getting over 20 mpg on the highway when unloaded, particularly with newer models. 
This video reviews the 2025 Ram 2500 Cummins and its fuel economy: 58sAuto Auction RebuildsYouTube · Sep 8, 2025
MPG breakdown

• City: Approximately 14-16 mpg.
• Highway: Approximately 17-21 mpg.
• Mixed/Real-world: Around 15 mpg is a common average for mixed driving. 

Factors that affect MPG

• Towing: Hauling a heavy load will significantly decrease fuel economy. 
• Driving habits: Aggressive acceleration and high speeds reduce MPG. 
• Model year: Newer models with updated transmissions may show improved efficiency. 
• Tire size and modifications: Larger tires and aftermarket modifications can impact fuel economy. 

How many miles per gallon does a 6.7 F 250 diesel get?

A Ford F-250 with the 6.7L diesel engine typically gets 18-20 mpg on the highway and 15-18 mpg in mixed city/highway driving when unloaded. Fuel economy drops significantly when towing, with estimates ranging from 8.9 to 12-15 mpg depending on the load. Real-world mileage is affected by driving style, speed, terrain, and other factors. 
Unloaded driving

• Highway: Expect around 18-20 mpg on the highway under optimal conditions. Some drivers report getting as high as 24 mpg on highways, particularly with the high-output (HO) engine and gentle driving. 
• Mixed/City: You can expect a combined average of 15-18 mpg. 
• Factors: Driving speed has a significant impact. Driving at 80 mph can reduce fuel economy compared to driving at 60-65 mph, where you might see higher mileage. 

This video shows a real-world fuel economy test of a Ford F-250 diesel truck: 40sSkinner’s DOSEYouTube · Nov 11, 2025
Towing

• Towing MPG: When towing, fuel economy can drop to 12-15 mpg. 
• Heavier loads: With very heavy loads (e.g., a 17,000 lb 5th wheel), mileage can drop to under 9 mpg. 

This video demonstrates a fuel economy test of a Ford F-250 diesel while towing a trailer: 59sTFLnowYouTube · Apr 9, 2025
Other considerations

• High-output (HO) engine: The high-output version of the 6.7L engine offers more power with little to no difference in fuel consumption compared to the standard engine under normal conditions. 
• Engine break-in: New engines may have lower fuel economy until they are broken in. 
• DPF delete: Aftermarket modifications like a DPF delete may increase MPG, but this is not recommended for street use.