2019 Ram 2500 6.4 Hemi Mpg (6.4 vs 5.7 Hemi Mpg Guide)
Usually, when you get a powerful engine, it drinks up the fuel very quickly. The more power the fewer miles per gallon. That has been the standard procedure ever since the first cars were built. It takes gas to run an engine.
This vehicle and that motor have been rated to get 13 mpg in the city and 16 mpg on the highway. It is better than other powerful engines but looks to see a drop in that total when you have to tow a heavy load. You may lose 5 to 10 mpg when towing.
To learn more about the mileage this truck and engine get, just continue to read our article. It has the information you want to know about so you can make a great purchase decision. Sometimes you have to sacrifice the mileage to get the power you need.
Which Ram 2500 Has The Best Mpg?
If you are strictly looking at the 2019 2500, all the trims were given the same mpg rating. That was as reported earlier, 13 city and 16 highway. But if you go back one year and look at the 5.7 you will find a different story.
The 5.7 hemi placed in the SLT 2dr Regular Cab 8 ft. LB 4WD was able to get 18 city and 24 highway miles per gallon. However, in the other 3 trims, it was able to get 28 in the city and 34 on the highway.
There is no doubt that the 5.7 hemi is the more economical motor. While the 6.4 and the 5.7 engines are 8 cylinders, the 6.7 was an 8A while the 5.7 was a 6A and that may be the reason for the difference in fuel economy.
This is not really news as historically, the 5.7 hemi routinely got over 25 mpg year after year. It is a very economical motor when compared to the 6.4 hemi. All of these results were conducted under ideal driving conditions and your results may not be as good as reported.
2019 Ram 2500 6.4 Hemi Mpg
The 2019 Ram 2500 Big Horn 6.4L V8 GAS Automatic 8 Speed Crew Cab Pickup consistently got 13 mpg in one test conducted by Fuelly and its best effort actually reached 21 mpg.
It is approx. 31 to 32-gallon fuel tank provides you with a range of roughly 400 miles approx. when driving empty. That is not a bad range for a truck of this caliber and power.
You may see a drop to 10.5 mpg or lower depending on the speed you are driving and how heavy the load you are towing is. That result was driving at 62 mph and towing a 9000-pound trailer.
If you are going to be driving in the mountains, then expect your fuel economy to drop to about 9 mpg when you are towing a 9500-pound trailer. To get a better rating, you may have to keep your speed below 70 mph and stick to perfectly flat roads.
There are many different factors that come into play when you are driving. Your results will vary from other drivers as everyone tends to drive differently.
Ram 2500 6.4 vs 5.7 Hemi Mpg
There is no real contest here. The 5.7 is the better, more economical engine. Its mileage rating is about double in the city and highway driving tests over the 6.4.
Of course, those results are under ideal conditions. Add about 9000 pounds of weight and see how low the 5.7’s results can go. In comparison to its competitors, the 6.4 was the lowest rated vehicle of its class.
The 5.7 was the highest in its class after being tested against similar vehicles from other brands. If you want more power, then it may be best to go with the 6.4 as it will deliver that power and make sure you get fair mpg results.
Some owners felt that the 6-speed in the 6.4 made it drink more fuel than the current 8-speed transmission that is in the 2019 models. That could be true but again it would depend on how you drive and where you drive.
When people report their states, they are very generic about road conditions, weather, and locations they drive. The best thing to do is test drive both and see what results you get.
2019 Ram 2500 6.4 Hemi Mpg Towing
This truck came with the newer 8-speed transmission and it had 2 different axle ratings. The 3.73 had a GVWR of 10,000 pounds, a payload space of 4,050 pounds, and a GCWR of 21,500 pounds.
It was rated to tow a trailer weighing up to 15,000 pounds. The 4.10 axle rating had the same GVWR, the same payload rating, and the GCWR was rated at 24,000 pounds. It was rated to tow a trailer weighing up to 17,500 pounds approx.
Those figures were for the RAM 2500 4X2 REG TRADESMAN 8' BOX. Those figures did not change too much when looking at the other trims this truck was made.
Sometimes the payload weight limit changed by 500 pounds either way depending on the trim. The tow rating went as much as 1000 pounds depending on the axle rating and the trim.
To get exact figures for all trims and axle ratings, just click here. That link leads you to a 7-page chart comparing all the trims and engine styles you can get.
Some Final Words
When you want both power and economy, you may not get both. One has to be sacrificed for the other. The 6.4 gets excellent power ratings but it does not get that fuel economy most people want to see.
It is a great motor and tows a lot of weight but do not expect it to compete with the 5.7 when it comes to mpg. The difference is like night and day.
