Anyone run a Ram 3500 with 6.4 Hemi?
Looking into a 13,500 lb gvw fifth wheel. It weighs too much for my F250. Does anyone pull anything that heavy with a 6.4? If so, how do you like it? Does it handle the mountains?
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Yeah, that's why I said it wasn't related FW towing. Just putting more info out there for the OP to show the capabilities of the truck.
Understood, and thanks for the links. As I read them I also see that Truck Camper Magazine drives often below the speed limit making their gas mileage numbers even worse for somebody hauling the same size and weight camper at 65 or 70 mph. I own a Ram 3500 Cummins 3.73 axles and carrying a camper that weighs about 4000 pounds routinely gets 13-14 mpg at 65 mph; substantially more than their 6.4. However, empty the 6.4 can get around 17 as it has cylinder deactivation. Loaded is where the mileage drops. Had thy gotten the 4.10 axles their mileage could actually be slightly better driving relatively slow as they do and the engine working less hard for cylinder deactivation to occur more. Lots of options to consider. The 6.4 has the same warranty as the Cummins and is sold as a medium truck gas engine and I suspect will last at least 200,000 miles. But when put under a load the fuel mileage is not a bragging issue.
Up to the Ike tunnel for about eight miles the 6.4 towing around 12,000 pounds got 2.8 mpg; their Cummins test with 17,000 pounds behind in a trailer got 5.8; twice the mileage, 5000 pounds heavier and about 15 mph faster. There is a difference between a gas engine and a diesel even though some of the 6.4 owners tend to minimize that fact for what they tow. Maybe they tow light trailers. Maybe they never towed their trailer with a diesel.
