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Tom Cobb 08-20-2006, 10:51 PM What kind of fuel mileage can be expected with a 4500 crewcab with 4:30 diff and D/A engine and trans??? I am considering buying one to tow horse trailers, rv's etc. mdirvin 08-21-2006, 12:34 AM There are many variables but here is what I get: Solo stop and go 12.5 Solo over the road 14.5 Towing on level to rolling 9.5 (19K 5th wheel) Towing in Colorardo 8 so far. I hope this helps. I might add that I use to have a 2500 HD with the 8.1 engine pulling a 14K 5th wheel, and it did not get anywhere near these figures. animal 08-21-2006, 05:58 AM 8 to 10 towing 12.5 to14 bobtail. We have the big unknown coming,ultra low sulphur fuel. animal woodpker 08-21-2006, 02:18 PM We just got back from Alaska and we averaged a bit under 8 mpg over 10,500 miles.. We were towing a 16,000 lb 5th wheel. I have an '06' 5500. knighte 08-22-2006, 12:08 AM My mileages are similar. 7.5 with 18k trailer and about 13 around and about. Tom Cobb 08-22-2006, 12:59 AM Thanks for your replies. I thought it was probably in range of what you all reported. Yellowmonkey 08-22-2006, 11:15 AM I have never gotten more then 11 MPG bobtail. City mileage is best with these trucks. When you get above 60 MPH, you lose more and more mileage. I only pull 8000-10000 pounds on a regular basis. Mileage is 9-10 MPG towing. Still better then dad's F-250 TD. cwilly1 08-24-2006, 02:13 AM I am getting around 9-10 mpg with a load. The trailer weighs 8300 empty and loaded around 18,000 to 25,000. Been using the truck for about 2 weeks or 4200 miles and that has been around the average. without a trailer i am only getting around 12. that is with exuast work and bully dog triple programmer on tow/economy. | ||