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How many miles per gallon does a Chevy 2500 HD diesel get?

The Chevy 2500 HD diesel pickup truck is known for its impressive towing capacity and power, but how does it perform when it comes to fuel efficiency? According to the latest data, the Chevy 2500 HD diesel can achieve an average of 18-20 miles per gallon (MPG) in combined city and highway driving.

Factors Affecting Fuel Economy

The fuel efficiency of the Chevy 2500 HD diesel can vary depending on several factors, including:

Driving Conditions: Fuel economy tends to be higher on the highway compared to stop-and-go city driving, where the engine has to work harder.

Payload and Towing: Hauling heavy loads or towing a trailer can significantly reduce the truck's MPG, as the engine has to work harder to move the additional weight.

Driving Style: Aggressive acceleration, high speeds, and frequent braking can all negatively impact fuel efficiency.

Engine and Transmission: The specific engine and transmission configuration of the Chevy 2500 HD diesel can also affect its MPG ratings.

It's important to note that the EPA-estimated fuel economy for the Chevy 2500 HD diesel is 17 MPG in the city, 22 MPG on the highway, and 19 MPG combined. However, real-world driving conditions can result in slightly different fuel efficiency numbers.

Improving Fuel Economy

There are several ways Chevy 2500 HD diesel owners can improve their truck's fuel efficiency, including:

Maintaining Proper Tire Pressure: Keeping the tires inflated to the recommended pressure can improve MPG by reducing rolling resistance.

Using the Right Motor Oil: Choosing a high-quality, low-viscosity motor oil can help reduce engine friction and improve fuel economy.

Avoiding Excessive Idling: Letting the engine run while the vehicle is stationary can significantly reduce fuel efficiency.

Driving at Moderate Speeds: Fuel efficiency typically decreases at speeds above 50 mph, so keeping the speed limit can help maximize MPG.

By understanding the factors that affect fuel economy and implementing these strategies, Chevy 2500 HD diesel owners can maximize their truck's fuel efficiency and save money on fuel costs.

How many miles per gallon does a 6.6 Duramax get?

The 6.6L Duramax engine's MPG varies, but typically ranges from 15-18 MPG for mixed driving and 17-20 MPG for unloaded highway driving. Actual mileage depends heavily on factors like driving conditions, towing, and the specific model year. Some newer models achieve higher efficiency, with a 2025 Silverado HD hitting 20.4 MPG on a controlled highway loop.
This video shows a fuel economy test of a 2021 Chevy Silverado HD with the 6.6L Duramax engine towing a trailer: 48struckguyjoeYouTube · Jan 15, 2021
Mileage breakdown by driving type:
This video demonstrates a fuel economy test of a 2024 Chevy Silverado HD Duramax: 57sDaily MotorYouTube · Jun 27, 2023

Mixed/City: Around 15 MPG or lower, especially with stop-and-go traffic.
Highway (unloaded): Typically 17-20 MPG, but can vary with speed.
Towing: Expect significantly lower mileage, often in the 10-14 MPG range depending on the load and terrain.

Factors that influence MPG:

Towing and load: Hauling heavy loads reduces fuel efficiency.
Driving conditions: Hilly terrain or stop-and-go city traffic lowers MPG.
Vehicle age and break-in: Newer trucks may improve after an initial break-in period, with some owners reporting increased mileage after a few thousand miles.
Other factors: Speed, road conditions, and factors like the truck's emissions system (e.g., temporary DPF regen cycles) can also have an effect.

You can watch this video to see real-world mileage results for a 2022 GMC Sierra 2500 Duramax: 1mDaily MotorYouTube · Mar 26, 2022

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

A Ram 2500 with the 6.7L Cummins engine typically gets 15-18 MPG in mixed driving, while highway-only mileage can range from 18-25 MPG under favorable conditions. Towing significantly reduces fuel economy, often bringing it down to 10-13 MPG. Factors like model year, driving style, load, and road conditions greatly influence the final MPG.
Expected MPG by driving type

Mixed Driving: Around 15-18 MPG.
18-25 MPG: Highway Driving (unloaded): is possible, especially when driving smoothly at lower speeds.
10-13 MPG: Towing: is common when towing a heavy load, such as a 10,000-12,000 lb trailer.

Factors that affect MPG

Driving Habits: Aggressive acceleration and high speeds will decrease your MPG.
Towing and Hauling: Carrying heavy loads significantly impacts fuel economy.
Tire Size and Modifications: Larger or off-road tires can lower MPG.
Model Year: Newer models may have updated emissions and calibrations that affect fuel economy. For example, some users reported a drop in MPG after a 2019 EPA calibration, while others saw impressive highway numbers after the fix.
Maintenance: Keeping up with regular maintenance can help maintain optimal fuel efficiency.

What is the gas mileage on a Silverado 2500HD diesel engine?

A Chevy 2500 diesel typically gets around 15-21 mpg, depending on driving conditions. Unloaded highway driving often yields 17-21 mpg, while city or mixed driving is closer to 15-18 mpg. Real-world mileage can vary significantly due to factors like towing, which can lower fuel economy, but the diesel engine maintains efficiency better under heavy loads than a gas engine.
MPG estimates by driving condition

Highway: 17-21 mpg
Mixed/City: 15-18 mpg
With heavy loads: Can be lower, but diesel engines are often more efficient when towing than gasoline versions

Factors that influence MPG

Towing and load: Hauling heavy loads reduces fuel economy.
Driving style: Aggressive acceleration and high speeds will lower MPG.
Aerodynamics: The truck's design plays a role, but factors like carrying a large, flat-sided load (like a camper) can increase drag.
Maintenance: Keeping up with maintenance can help ensure the engine runs efficiently.

1:01DURAMAX DIESEL, Real World Fuel MileageYouTubeOutdoors With The Morgans · 1y 1:00Here's the Real MPG on the 2024 Chevy Silverado HD DuramaxYouTubeTruck King · 2y 0:472020 chevrolet Silverado 2500hd duramax average miles per gallonYouTubeMetal Works · 5y (function(){
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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.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.