Does a 2500 get better gas mileage than a 3500?

In most configurations, a Ram 2500 tends to deliver better fuel economy than a Ram 3500 when both are equipped with similar gasoline engines and standard drivetrains. The 3500’s greater weight, heftier suspension, and, in many cases, dual rear wheels can reduce efficiency. However, engine choice, drivetrain, and how the truck is used can narrow or reverse the gap.

Beyond a simple size comparison, fuel economy depends on a host of variables such as engine type (gasoline vs. diesel), cab/bed configuration, 4x4 versus 4x2, payload and towing loads, tire choice, and driving conditions. This article breaks down why mpg differs between the two models and what typical ranges look like for common setups as of the most recent model years.

Key factors that influence mpg between 2500 and 3500

The following factors are the most influential when comparing mpg across 2500 and 3500 models. Each can tilt the balance toward better fuel economy or worse, depending on configuration and use case.

• Engine selection (gasoline vs. diesel) and displacement


• Drivetrain configuration (2WD vs. 4WD, and whether the 3500 is a dual rear wheel DRW)


• Weight and payload capacity (the 3500 is typically heavier, especially with DRW)


• Aerodynamics and tire sizing (larger tires and heavier wheels can reduce efficiency)


• Towing and payload demand (heavier loads generally lower mpg)


• Transmission tuning and gearing (overdrive, torque converter behavior, and axle ratios)

When these factors are considered together, the 2500 usually edges ahead in highway and overall mpg for comparable gasoline configurations, while the 3500 can catch up or surpass it in certain diesel setups or when towing heavy loads frequently.

Typical mpg ranges by common configurations (EPA-style estimates)

To illustrate how mpg can vary, here are typical ranges for common configurations. Remember that actual numbers depend on year, engine, cab/bed choice, drivetrain, and whether the vehicle is 4x2 or 4x4.

• 2500 with gasoline engine (4x2, SRW): roughly 13–16 mpg city and 18–22 mpg highway.


• 3500 with gasoline engine (4x2, SRW): roughly 12–15 mpg city and 17–20 mpg highway.


• 2500 with diesel engine (6.7L Cummins, SRW): roughly 15–18 mpg city and 22–26 mpg highway.


• 3500 with diesel engine (6.7L Cummins, SRW): roughly 15–19 mpg city and 23–28 mpg highway.


• 3500 with dual rear wheels (DRW) tends to have lower mpg than its SRW counterpart due to extra weight and rolling resistance.

In practice, diesel-powered 3500s often deliver strong highway efficiency, but their heavier frame and, in DRW forms, greater rolling resistance can offset some of that gain. Gasoline 2500s typically post better numbers in everyday driving, especially in city and light-duty use.

Real-world considerations and how you use the truck

Numbers tell only part of the story. Real-world fuel economy depends on how you use the truck, what you tow, and where you drive. The following considerations commonly influence mpg in everyday use.

• Towing and payload: Heavier loads dramatically affect fuel economy, regardless of model year or engine.


• Terrain and climate: Hilly terrain, headwinds, and stop-and-go city driving reduce mpg more for heavier trucks.


• Maintenance and setup: Proper tire inflation, alignment, and clean air filters help maintain expected efficiency.


• Driving style: Quick acceleration and high-speed cruising reduce mpg; smooth, steady cruising helps on highways.

Bottom line: if you frequently tow or carry heavy payloads, the 3500—even with a diesel—may not deliver better mpg than a lightly loaded 2500. If you’re prioritizing daily driving efficiency and light duty, a 2500 gasoline setup is often more economical.

Bottom line

For the majority of typical use cases, a Ram 2500 will offer better fuel economy than a Ram 3500 with similar gasoline configurations, thanks to lower weight and less aggressive gearing. The 3500 can rival or surpass the 2500 in certain diesel configurations or when towing substantial loads, but DRW variants and heavier payload targets tend to reduce efficiency. Always compare the specific EPA-estimated mpg for the exact trim, engine, and drivetrain you’re considering, as numbers vary by model year and configuration.

Summary

The 2500 generally delivers better mpg than the 3500 in similar gasoline setups, thanks to lower weight and simpler drivetrains. Diesel options can narrow or reverse the gap, especially on highway driving, and dual-rear-wheel 3500s tend to be less efficient. For accurate guidance, check the exact EPA ratings for the precise configuration you’re eyeing, and consider how you’ll use the truck day to day.

What 3/4 diesel truck gets the best MPG?

The most fuel-efficient 3/4-ton diesel trucks are generally the Ram 2500 Cummins, Ford F-250 Power Stroke, and Chevy/GMC 2500 Duramax. While exact MPG varies by model year, configuration, and driving conditions, these models often achieve around 17–20 mpg highway and 15–18 mpg with mixed driving. Newer, more powerful versions may be more fuel-efficient than older models. 
Key factors influencing fuel efficiency

• Engine and drivetrain: Different engine and drivetrain options will have different fuel economy ratings. For example, the Cummins and Duramax engines are both known for their efficiency and power. 
• Configuration: Your truck's configuration can also impact fuel efficiency. 4WD models generally have slightly lower MPG than 2WD models, but a larger fuel tank can help you go longer distances before refueling. 
• Driving conditions: Fuel efficiency is also affected by driving conditions. A truck's MPG will vary depending on whether you are driving on the highway, in the city, or towing a load. 
• Model year: Fuel efficiency can vary by model year. Newer models often have more advanced engine technology that can improve fuel economy. 

What is the gas mileage on a Chevy 2500?

Chevy Silverado HD MPG for highway driving: 17 to 18 mpg. Chevy Silverado HD MPG combined: 15 mpg.

How many miles per gallon does a 3500 diesel get?

Efficiency leaders: Chevrolet/GMC 2500/3500 Duramax 6.6L, Ford F-250/F-350 6.7L, Ram 2500/3500 6.7L. Unloaded highway runs often deliver 17–20 mpg when geared sensibly.

Is there a big difference between 2500 and 3500?

Yes, there is a big difference, primarily in towing and payload capacity, with the 3500 model being significantly more powerful and capable. The 3500 is built for the heaviest demands, often featuring a beefier suspension, a larger rear axle, and the option for dual rear wheels, while the 2500 is a capable heavy-duty truck for more common heavy-duty tasks.
 
Towing and payload

• 2500: Offers a respectable towing capacity, generally between 14,500 and 20,000 pounds, and a payload capacity of around 3,500 to 3,700 pounds.
• 3500: Has a significantly higher capacity, with a maximum towing capacity up to 36,000 pounds and a maximum payload up to 7,234 pounds. 

Physical and mechanical differences

• Suspension: The 3500 has a more robust suspension system to handle higher loads. Some models may have an extra leaf spring on the rear axle. 
• Rear axle: The most significant physical difference is the option for dual rear wheels (DRW) on the 3500, which greatly increases its stability and towing capacity. The 2500 is typically single rear wheel (SRW). 
• Frame: The 3500 has a reinforced frame to support the increased weight. 

Driving experience

• 2500: Generally provides a smoother and more agile ride, making it better suited for daily driving. 
• 3500: Can feel more cumbersome, especially in tight spaces, but its added strength is beneficial for heavy hauling. 

Which one is right for you?

• Choose the 2500 if you need a heavy-duty truck for regular use that still offers a more comfortable daily driving experience.
• Choose the 3500 if your work or lifestyle involves regularly towing very heavy fifth-wheel trailers, commercial-grade equipment, or hauling the maximum possible weight.