MPG
Freshman User
Joined: Feb 2009
Posts: 48
Likes: 0
The best most honest MPG I've ever attained on my 08 SRW 4X4 Super crew 3.73 rear end, was about 20 MPG. I was traveling 125 miles, at night, no wind, freeway. Elevations from 4000 to 6000 feet, rolling terrain. I think I had kept my RPMs to about 1900. Like Senix, I play at keeping the boost as low as practical. I had about 20K miles on it at the time.
I am getting about 16 to 17 typically. I try not to jackrabbit start and ease into speed when I can. If I am approaching stop lights, I do the best I can (without pissing off my fellow livestock) to hit them green or at least let others trip them to green for me. Getting trucks as big as these rolling from a dead stop sucks fuel like crazy.
Towing is completely different though. I haven't really found that "zone" for pulling my RV and getting anything to brag about. I am in there about 9 MPG average going about 65 MPH. Probably typical.
I am getting about 16 to 17 typically. I try not to jackrabbit start and ease into speed when I can. If I am approaching stop lights, I do the best I can (without pissing off my fellow livestock) to hit them green or at least let others trip them to green for me. Getting trucks as big as these rolling from a dead stop sucks fuel like crazy.
Towing is completely different though. I haven't really found that "zone" for pulling my RV and getting anything to brag about. I am in there about 9 MPG average going about 65 MPH. Probably typical.
Mountain Pass
Joined: Oct 2003
Posts: 126
Likes: 0
a few months ago I would easily hand calculate 16mpg on my 2010 F-250 CC/SB 4x4 with 3.55 gears (even as high as 18mpg driving nice). Two weeks ago I drove 196 miles on flat terrain with only a few stop signs along the way. I folded in the mirrors, never used cruise, kept it under 60mph and kept the boost below 10psi when possible. I filled up when I got to my destination and only got 13.7mpg hand calculated. I left my house at 4am and there was no wind. On the way home I drove like I normally would and got 12.4 hand calculated. I don't understand why I would lose 25% of my fuel economy. The fuel filter was changed shortly after I noticed the drop in MPG thinking that was the problem. I also started using Ford's Cetane Boost which has not helped the MPG. I have started writing down my regen mileage and it has varied between 85-220 miles between regens mostly driving empty. Seems to be something wrong with the truck, but the dealer says "no codes, no problems". Anyone experience a drop in mileage like this???
Cargo Master
Joined: Jan 2006
Posts: 3,009
Likes: 88
From: SE. MA
a few months ago I would easily hand calculate 16mpg on my 2010 F-250 CC/SB 4x4 with 3.55 gears (even as high as 18mpg driving nice). Two weeks ago I drove 196 miles on flat terrain with only a few stop signs along the way. I folded in the mirrors, never used cruise, kept it under 60mph and kept the boost below 10psi when possible. I filled up when I got to my destination and only got 13.7mpg hand calculated. I left my house at 4am and there was no wind. On the way home I drove like I normally would and got 12.4 hand calculated. I don't understand why I would lose 25% of my fuel economy. The fuel filter was changed shortly after I noticed the drop in MPG thinking that was the problem. I also started using Ford's Cetane Boost which has not helped the MPG. I have started writing down my regen mileage and it has varied between 85-220 miles between regens mostly driving empty. Seems to be something wrong with the truck, but the dealer says "no codes, no problems". Anyone experience a drop in mileage like this???
Mountain Pass
Joined: Oct 2003
Posts: 126
Likes: 0
The truck has 62,000 miles and about 10K on the air filter
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Super Moderator
Joined: Aug 2008
Posts: 37,370
Likes: 1,858
From: Frederick, MD
My symtoms were not so much how much boost I could produce under load but rather when I was empty on country roads where I would normally see no boost or just a needles worth. In those cases I was producing 10-15psi.
Fleet Mechanic
Joined: Oct 2011
Posts: 1,778
Likes: 286
From: Down SOUTH
Filled up today.
Drove 106.8 miles as easy as I could at 1900 rpm on interstate.
Refilled with 6.6 gals of fuel which equalled only 16.1 mpg on my 2008 F350 4x4 CC SRW 8ft bed.
So I'm kinda bummed.
My 1996 F350 7.3L manual trans will get 19.5 mpg so I'm kinda bummed !!!
Drove 106.8 miles as easy as I could at 1900 rpm on interstate.
Refilled with 6.6 gals of fuel which equalled only 16.1 mpg on my 2008 F350 4x4 CC SRW 8ft bed.
So I'm kinda bummed.
My 1996 F350 7.3L manual trans will get 19.5 mpg so I'm kinda bummed !!!
Logistics Pro
Joined: Nov 2001
Posts: 3,787
Likes: 102
From: Georgia
Filled up today.
Drove 106.8 miles as easy as I could at 1900 rpm on interstate.
Refilled with 6.6 gals of fuel which equalled only 16.1 mpg on my 2008 F350 4x4 CC SRW 8ft bed.
So I'm kinda bummed.
My 1996 F350 7.3L manual trans will get 19.5 mpg so I'm kinda bummed !!!
Drove 106.8 miles as easy as I could at 1900 rpm on interstate.
Refilled with 6.6 gals of fuel which equalled only 16.1 mpg on my 2008 F350 4x4 CC SRW 8ft bed.
So I'm kinda bummed.
My 1996 F350 7.3L manual trans will get 19.5 mpg so I'm kinda bummed !!!
Posting Guru
Joined: Apr 2008
Posts: 2,392
Likes: 1
From: Green Lane, Pa.
Filled up today.
Drove 106.8 miles as easy as I could at 1900 rpm on interstate.
Refilled with 6.6 gals of fuel which equalled only 16.1 mpg on my 2008 F350 4x4 CC SRW 8ft bed.
So I'm kinda bummed.
My 1996 F350 7.3L manual trans will get 19.5 mpg so I'm kinda bummed !!!
Drove 106.8 miles as easy as I could at 1900 rpm on interstate.
Refilled with 6.6 gals of fuel which equalled only 16.1 mpg on my 2008 F350 4x4 CC SRW 8ft bed.
So I'm kinda bummed.
My 1996 F350 7.3L manual trans will get 19.5 mpg so I'm kinda bummed !!!
Your comparing apples and hamburgers, your 7.3 does not have a DPF system and the power output between the 2 is totally different.
