Mpg!
Posting Guru
Joined: Nov 2002
Posts: 1,222
Likes: 4
From: Texas
My 450 now has 7000 miles and best ever on the computer is 14.0 driving on cruise at 62 mph. Mostly gets 12.5-13.2 without babying it. No doubt if the engine goes over 21-2200 rpms, the mileage starts dropping. Trailer I have weighs 17080, got 9.1 overall on trip to Durango last month--entire setup weighs in a 27000+
The 6.4 seems to be a very different engine than the 6.0 I had--almost no downshifting, just pulls the trailer very well. One thing I have a problem with--can't force a downshift unless speed has dropped 8-10mph, sometimes more. Kinda hurts climbing steep, long grades. Once downshift occurs, can always gain speed back. Not sure if this is normal with the 6.4 or I have a programming problem. AND Ford needs to give us a way to use
4th (Drive) and lock it in.
The 6.4 seems to be a very different engine than the 6.0 I had--almost no downshifting, just pulls the trailer very well. One thing I have a problem with--can't force a downshift unless speed has dropped 8-10mph, sometimes more. Kinda hurts climbing steep, long grades. Once downshift occurs, can always gain speed back. Not sure if this is normal with the 6.4 or I have a programming problem. AND Ford needs to give us a way to use
4th (Drive) and lock it in.
Mountain Pass
Joined: Aug 2007
Posts: 113
Likes: 0
From: Viva Las Vegas
Here we go again. dt75flh: I tow a 36' fifth wheel trailer, triple axle, GCW very close to 23500 on the scales. It's a heavy load for my 250 and I run long distances. I have never gotten less than 8 MPG hand calculated (as accurate as I can).
I'm not claiming there is anything wrong with your truck or that mine is perfect. I just don't get how things can be so different. Maybe your 4.10 vs. my 3.73?
I'm not claiming there is anything wrong with your truck or that mine is perfect. I just don't get how things can be so different. Maybe your 4.10 vs. my 3.73?
im still getting 5.9 to 6.7 towing whether going 60-75...
i think there is a problem with my truck as the mileage is horrible....
the 4.10 gears are to compensate for the tires im running and my speedo is only 1 mph off at 80...(gps verified)
when the truck was new and before the new flash and new dpf i would get 8-9 towing and im around 21000 # now....
(current trip towing my towhauler empty)
i towed my rock crawler on a car hauler from vegas to moab (6500) at 70 mph with the cruise on and avg 10 mpg (prior to the reflash and dpf)
im also now regen every 30-50 miles with the trailer connected...
im stumped and my service guy is also.....
any one have any ideas?
no codes and no driveabilty concerns...this is my third diesel truck
(thread hijack over)
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