I had a 6.4 in a regular cab 2500. I pulled a travel trailer weighing just under 10k pounds. I live at sea level and did not pull the TT at elevation higher than 1k feet. In those circumstances the 6.4 pulled great. The empty mileage was about 15 and the towing mileage was just under 9 MPG. I have sold the truck and now have a 3500 CTD to pull a much larger 5th wheel camper. Within it's limits the 6.4 is a good alternative to the CTD but I would not overload it and expect it to do well.
Go to the 6.4 forum on this site there is a big thread with the numbers your looking for... but I get 12-13 in town and up to 17 on the highway depending on wind and hills.
I have a crew cab 8ft box and get an average of 13 empty and 10 pulling a 5k 18 ft box trailer. Have had an issue with the exhaust when it cuts the cylinders out for economy. Dodge just replaced a muffler and not sure yet whether that was the fix. Other than that its' a good truck and pulls nice.
I have a 2014 and tow an Airstream 28' which weighs about 9,00 - 9,500 lbs. I get 18 mpg all around driving and 12 towing. Highway speeds towing is between 60 & 70. Picked up approximately 2 mpg with the 8 speed.
Love it
Love the 6.4 but thank god gas is down to $2.099:smileup: I get 11mpg in the city, 13 change on the highway, 12MPG lifetime with 11,000 miles. 4x4 3.73 crew cab 6-4 bed.
Love the 6.4 but thank god gas is down to $2.099:smileup: I get 11mpg in the city, 13 change on the highway, 12MPG lifetime with 11,000 miles. 4x4 3.73 crew cab 6-4 bed.
Purchased the Ram in Apr. of 14. Have now close to 15k on it. About 5 of that towing a 27'5th wheel 13 plus k toy hauler. Have towed in CO , western slope and across Vail Pass. Also have towed across SD. upper and lower elevations. Love the truck in general for towing. Especially the handling and the engine brake portion. What I didn't like was standard gear ratio, 3.73. The 6.4 has awesome power but with those gears, need to be in the mid 4's and above for rpm. Also, the computer controlled shift is, in my opinion, not programmed for the optimal power that the engine is capable. That said, "cured the problem". Had my local Ram dealer install the 4.56 gearing. WOW!! nice difference. With the 3.73's was getting about 16 on the hi way (CO mountains and SD trip) between 14 and 16 in town, and pulling, about 8 in ether higher or lower elevations. After the gear change, getting about 14+ to 16+ in town, yet to drive in lower elevations but going from Junction, Co to Denver and back at 70 plus and having 300# slider and 250# generator in the back, got 15.5 average. Towing, not yet in lower elevation, 6000' and above in Co mountains, getting about 10. Suspect will get in 12's when down on elevation and hills. As for towing rpm's, now can pull in the mid 2's to mid 3's unless on a heavy pull. then in low 4's. Very nice difference and a more pleasurable driving vehicle. Not the constant up/ dn. shifts. Sure wish Ram would start offering and equipping the 2500 trucks with the lower gears. Should have the 3.73 as an option and the 4.10's as standard gearing. MY thoughts. lol
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