Would appreciate hearing from people who tow a fifth wheel using either Ford TD 7.3 with 3.73 axle ratio or Chevy TD 6.6 with 3.73 axle ratio to help me get an idea of what kinds of gas mileage you get both towing and not.
Thanks very much.
We have a 2000 Ford TD and pull a 35', 12,500 pound 5th wheel. When pulling we get from 10-13, generally about 11 mpg. When we are in the mountains, it will be around 10. Or, strong headwinds will do the same, although I have see 9 going into a 35 mph wind.
I drive about 62 mph plus or minus. Once you get over 65, you will see it drop a little.
I have 40,000 on it and about 18,000 pulling. It pulls fine and the engine runs as well as when I picked the truck up. In the mountains, the diesel really makes a difference. While gas engines are struggling, the diesel just keeps pulling. It just loves to pull.
I've only pulled my 5er (10,000 lbs.) twice with the new Silverado, but I got around 13 mpg, with one leg a little lower because of a head wind. I average about 17 daily driving (including city miles, stop and go) and have broke 20 on the highway. This has mostly been on winter blend up here in Michigan, so I think my numbers will go up slightly...also because I'm getting closer to breaking the engine in. I don't think you'd see a major difference in mileage between any of the big three diesels, assuming similar driving/towing conditions. I do know that you'll see a major difference if your previous truck was a gasser. No comparison in power vs. fuel economy to the diesel beasts.
I do not have a Ford or Chevy but I do have a Cummins 5.9 turbo diesel, modified. I generally do 18.5 mpg in the city and 21 on the highway. When towing, I usually get about 13 on the flats and 12 in the mountains.
I just got my Duramax 6.6 a couple of months ago. So far, I am getting 16-17 city and 19-20 highway (65-75mph) not towing. We will try towing next month as I want to be finished with snow. My truck is a 2500HD 4X4, Allison auto, crew cab, short box with 2400 miles so far and I love it. Hope this helps.
*This Message was edited on 15-Mar-02 09:33 PM by Jim Hooks*
*This Message was edited on 15-Mar-02 09:41 PM by Jim Hooks*