Looking for MPG (UPDATE)
I am thinking of buying a F250 with a 6.7 diesel, I was wondering anybody who has that motor and towing what MPG they are getting because the short box super cab and crew has a 26 gal tank and the lon...
Forum Discussion
crshman wrote:4x4ord wrote:
My '11 with 20" wheels gets about 17 miles/US gal non towing. This is based on a long enough trip to include a regen. Summer time I might get 19 mpg. Towing I get anywhere from 5 to 11 mpg depending on what I'm towing. 11 towing the Rv....about 23 - 24000 lbs gross combined weight.
How fast are you driving loaded and unloaded to get those numbers?
I calculated FishOnOne's average speed to be 55 mph from his picture.
I drive my '14 F250 6.7 with a lead foot around 80 mph and I see 15mpg unloaded on average.
When I pulled my 14k 5vr doing about 70 mph I was around 8mpg.
Wind and elevation both make a huge difference to these trucks. A grade change that you wouldn't notice in a car can effect the fuel mileage of a truck very significantly. The best is to average the mileage; there and back. (At 60 mph a 24,000 lb truck/trailer combination climbing a 0.5% grade would require 19 additional HP over what it would take to pull that load on a level surface. You could expect to burn an additional 1.25 gallons per hour of diesel climbing at that slight rate. So instead of burning 6 gallons per hour you would burn 7.25 gallons to drive that same 60 miles....which would be the difference of 10 mpg to 8 mpg. Climbing a 0.5% grade for 60 miles would mean an elevation increase of about 1600 ft over the trip. If your trip has a lot of up and down you might not see an overall elevation gain but still use power to pull up the grades. Then rather than regain the energy coming down you might turn the energy into heat by holding the load back with the engine or brakes)
A side wind can cause as much or even more drag than a head wind on some vehicles.
