David Schwandt
It really depends on the load that you are hauling as to what kind of fuel usage you will have. A Diesel will give way better mpg pulling than any gas engine. The answer is just how many big rigs do you see using a big gas engine to pull a load.My set up is a 95 Dodge Ram 2500 4x4,auto , 355 gears and the 5.9 cummins .I can get 26 mpg empty not pulling under 70 mph or under 2000 rpm.pulling my 10500 lb gvw fiver that loaded usual weight camping is 9200 and the truck at 7300 .towing I have gotten 15.5 with no wind and under 1800 rpm`s . So fuel usage depend on your right foot and the weather and the hills and speed you travel at.My fiver (fifth wheel camper) is so high over my truck that I do feel a gust of wind and I can run any speed but I pay for that speed in mpg .A bumper pull trailer of the same weight can be longer and I have seen better mpg`s because they are are a lot lower . I have read the the regen system on the diesels wast a bunch of fuel if you run them like a car more than use them for towing you will not have great fuel mpg. My truck with a few mods now has 342 hp at the back wheels on a dyno and 685 ft lb torque and I would love a little more for the hills. A friend and myself travelled to the same camp ground this summer . He towed a lighter fifth wheel with his Hemi and used $30.00 more dollars for the same tip in gas than I used for diesel.But I think he used his cruse control and they will eat gas doing that. I pick a speed and hold my right foot where it was on the flats and keep it there on the hills. The truck will slow down some but it will settle in and pull
the hill with my foot no where near the floor.
It really depends on the load that you are hauling as to what kind of fuel usage you will have. A Diesel will give way better mpg pulling than any gas engine. The answer is just how many big rigs do you see using a big gas engine to pull a load.My set up is a 95 Dodge Ram 2500 4x4,auto , 355 gears and the 5.9 cummins .I can get 26 mpg empty not pulling under 70 mph or under 2000 rpm.pulling my 10500 lb gvw fiver that loaded usual weight camping is 9200 and the truck at 7300 .towing I have gotten 15.5 with no wind and under 1800 rpm`s . So fuel usage depend on your right foot and the weather and the hills and speed you travel at.My fiver (fifth wheel camper) is so high over my truck that I do feel a gust of wind and I can run any speed but I pay for that speed in mpg .A bumper pull trailer of the same weight can be longer and I have seen better mpg`s because they are are a lot lower . I have read the the regen system on the diesels wast a bunch of fuel if you run them like a car more than use them for towing you will not have great fuel mpg. My truck with a few mods now has 342 hp at the back wheels on a dyno and 685 ft lb torque and I would love a little more for the hills. A friend and myself travelled to the same camp ground this summer . He towed a lighter fifth wheel with his Hemi and used $30.00 more dollars for the same tip in gas than I used for diesel.But I think he used his cruse control and they will eat gas doing that. I pick a speed and hold my right foot where it was on the flats and keep it there on the hills. The truck will slow down some but it will settle in and pull
the hill with my foot no where near the floor.