2010 terrible mpg
Elder User
Joined: Jan 2009
Posts: 696
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From: Melissa TX
I go about 65mph on the highway which is between 1500 and 1750 rpm I believe. Now I'm going off of the truck what it reads. I filled up off of a hwy and reset everything and I went about 100 miles before getting off the hwy and it said I was getting 18.4 mpg going 65 mph. If that was true or not I don't know but going 100 miles the needle barely got off the F.
Logistics Pro
Joined: Nov 2001
Posts: 3,787
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From: Georgia
Don't forget voiding the warranty. There are some awful expensive things that can go wrong with these trucks. Now if you have the right relationship with the dealer.....
Hotshot
Joined: Nov 2000
Posts: 11,591
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From: Pflugerville, tx
and what size tire?
my DRW has 17s.. bet you had 20's..
based on my calcs, and guess at your tire size.. my rpms at 70 is 2329
245x75x17, 4.10 rear,
yours is probably more like 1863, 275x65x20, 3.55 rear
1863 is near that sweet spot
sam
final tranny drive ratio = 0.76
my DRW has 17s.. bet you had 20's..
based on my calcs, and guess at your tire size.. my rpms at 70 is 2329
245x75x17, 4.10 rear,
yours is probably more like 1863, 275x65x20, 3.55 rear
1863 is near that sweet spot
sam
final tranny drive ratio = 0.76
Elder User
Joined: Jan 2009
Posts: 696
Likes: 1
From: Melissa TX
No I have 18's. And the tires size are 295-65-18
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Freshman User
Joined: Feb 2007
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From: Corunna, Ontario
I have a 2010 F-250 CC SB 4x4 lariat with 3.55's on the 20's and filled up today with 507.6 miles on the tripometer and i put in 29.9453 gallons. That works out to 16.9509 miles per gallon.
I've got 10000 miles on the truck and did no towing on this tank. Broke it down to 30% city 40% hwy @ 55mph and 30% hwy @ 67-68mph.
I think the tavel %'s are very close and the tank is filled til i see fuel in the filler neck everytime. I'm happy with the results, my wifes old Envoy didn't do much better than my truck.
I've got 10000 miles on the truck and did no towing on this tank. Broke it down to 30% city 40% hwy @ 55mph and 30% hwy @ 67-68mph.
I think the tavel %'s are very close and the tank is filled til i see fuel in the filler neck everytime. I'm happy with the results, my wifes old Envoy didn't do much better than my truck.
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fordfarmer12
1999 - 2016 Super Duty
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Mar 14, 2012 03:25 PM
