How many miles per gallon does a 2021 Ram 2500 6.4 get?
The 2021 Ram 2500 with the 6.4-liter V8 typically gets about 14 miles per gallon combined, with 2WD models delivering around 12 mpg in the city and 17 mpg on the highway, and 4x4 models a touch lower on the highway (around 16 mpg).
Fuel economy figures depend on drivetrain, cab/bed configuration, payload, and towing. The Ram 2500 is built for power and payload, not maximum fuel efficiency, so real-world results vary widely.
EPA estimates by drivetrain
Before listing the official numbers, note that EPA ratings vary with drivetrain, cab/bed configuration, and axle ratio. The 6.4L Hemi in the Ram 2500 is paired with an 8-speed automatic and emphasizes capability over frugality.
- Two-wheel drive (2WD): 12 mpg city, 17 mpg highway, 14 mpg combined.
- Four-wheel drive (4x4): 12 mpg city, 16 mpg highway, 14 mpg combined.
These figures reflect typical EPA estimates for the 2021 Ram 2500 with the 6.4L V8. Real-world results will vary based on payload, towing, terrain, and driving style.
Real-world efficiency factors
In everyday use, numbers can shift due to towing heavy loads, stop-and-go driving, driving speed, and terrain. Payload, bed length, and gearing can all influence actual fuel economy beyond the EPA estimates.
Summary
For the 2021 Ram 2500 with the 6.4L gas engine, expect roughly 14 mpg combined on average. In practice, 2WD models typically deliver about 12 mpg in city driving and 17 mpg on highways, while 4x4 versions may see around 12 mpg city and 16 mpg highway. Actual results vary with use and conditions.
Is the 2021 Ram 2500 6.4 a good truck?
Love this 2021 RAM 2500 Crew Cab 8' bed
I bought the 6.4L Hemi with 8 Speed Automatic transmission in an 8' bed. I love the way it drives and with plenty of power to pull most anything I will ever pull. Very satisfied with my purchase.
What kind of gas mileage does a Ram 2500 6.4 Hemi get?
A Ram 2500 with the 6.4L HEMI engine typically gets 12 to 15 mpg in city driving and 17 to 18 mpg on the highway, though real-world mileage varies significantly depending on factors like driving style, terrain, and whether the truck is towing. Expect lower mileage, potentially in the 8 to 10 mpg range, when towing heavy loads.
Estimated gas mileage
- City: 12–15 mpg
- Highway: 17–18 mpg
- Towing (e.g., 6,500 lb trailer): Around 8–10 mpg
Factors that affect mileage
- Towing: Hauling a trailer will significantly decrease your fuel economy.
- Gearing: The rear axle ratio can impact efficiency, with some drivers reporting better or worse mileage depending on their gearing and tire size.
- Driving habits: Aggressive acceleration and high speeds will lower your mpg, while smooth, steady driving can improve it.
- Tire size: Upgraded or larger tires can affect your actual mileage compared to the factory estimates.
- Terrain: Driving in hilly or mountainous areas will use more fuel than driving on flat terrain.
- Maintenance: Properly inflating tires and keeping the engine well-maintained can help optimize fuel economy.
What is the gas mileage on a 2021 Ram 2500 6.4 Hemi?
The 2021 Ram 2500 with the 6.4L Hemi engine has an EPA-estimated fuel economy of around 12 mpg city and 18 mpg highway. However, real-world fuel economy is typically lower, often averaging 10-12 mpg in city driving and 14-16 mpg on the highway, depending heavily on driving conditions, terrain, and rear axle gearing.
- EPA estimates: The official estimates are 12 mpg city and 18 mpg highway.
- Real-world city: Owners report averages of 10–12 mpg for city driving.
- Real-world highway: You can expect around 14–16 mpg for highway driving, with some achieving 17–18 mpg on very specific, long-distance trips.
- Factors that influence MPG:
- Rear axle ratio: A higher ratio like 4.10 will decrease highway fuel economy compared to a lower ratio like 3.73.
- Driving habits: Aggressive acceleration and higher speeds will reduce MPG.
- Towing: Towing a heavy load can drop the mileage to as low as 8–10 mpg.
- Terrain: Driving in hilly areas will significantly lower your fuel economy.
Does the 6.4 Hemi require premium gas?
No, the 6.4L HEMI in Ram trucks does not require premium gas; the owner's manual for most models recommends 87 octane. While some 6.4L (392) performance engines in models like the Dodge Challenger and Charger may require 91 octane, the truck versions of the 6.4L HEMI are designed to run on 87 octane without issue. You may want to use higher octane fuel if you frequently tow heavy loads, are driving in very hot weather, or are driving in mountainous terrain, but it is not a requirement for daily driving, say Reddit users.
Key points
- Regular gas (878787) is sufficient: Most truck versions of the 6.4L HEMI are designed to run on regular unleaded gas (87 octane).
- Check your owner's manual: The specific recommendation can vary slightly by model year, so always consult your owner's manual for the definitive answer for your vehicle, notes this Reddit post, says this Facebook post.
- Higher octane is for performance versions: If you have a performance version of the 6.4L (like a 392 in a Charger or Challenger), it likely requires a higher octane fuel, such as 91 or 93 octane, to prevent engine knocking and achieve peak performance, according to DodgeGarage and this Facebook post.
- Premium is not necessary: You will not gain any significant benefit in performance or fuel economy from using premium gas in a 6.4L HEMI truck, and you will only be spending more money.
