12 MPG...WTF...
Thread Starter
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Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
12 MPG...WTF...
Ok guys,my truck in sig is only getting 12 mpg,oil is fresh,power seems to be good,air filter has less than 1500 miles on it,I guess boots are tight,it makes about 5 lbs on the highway,ebp sensor and tube were replaced a couple years ago, and this is running on 80 e the whole time,driving very easy,intentionally checking mileage.-m running a cps from international from about three years ago, I think it should be getting way better fuel mileage than this....any and all thoughts are welcomed and appreciated...thanks...Phil
Postmaster
Joined: Jan 2009
Posts: 2,544
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From: Suffolk, VA
So many possibilities, wish I had a smoking gun for you. But I noticed a while back that the caliper pins were sticking on my driver's side and I was getting a lot of brake dust there. After fixing that my mileage went up! I was dragging worse than I thought.
Posting Guru
Joined: Mar 2003
Posts: 1,521
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Ok guys,my truck in sig is only getting 12 mpg,oil is fresh,power seems to be good,air filter has less than 1500 miles on it,I guess boots are tight,it makes about 5 lbs on the highway,ebp sensor and tube were replaced a couple years ago, and this is running on 80 e the whole time,driving very easy,intenally checking mileage.-m running a cps from international from about three years ago, I think it should be getting way better fuel mileage than this....any and all thoughts are welcomed and appreciated...thanks...Phil
Junior User
Joined: Aug 2008
Posts: 87
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As your injectors get older your mileage will drop. How many miles do they have?
BTW, my truck is a manual and the best mileage I can get out of it is 18 MPG and that's with brand new injectors. 12 isn't terrible for one of these trucks. I'd say it's average.
BTW, my truck is a manual and the best mileage I can get out of it is 18 MPG and that's with brand new injectors. 12 isn't terrible for one of these trucks. I'd say it's average.
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Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
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Senior User
Joined: Jul 2009
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From: Trona, CA
If I were him, easy highway driving with a tuner, I would have expected at least 17-18
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Post Fiend
Joined: Mar 2007
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From: Texas
I don't see a sig. Tell us about the truck. 4x4? chip? lift? tire size? tire pressure? type of driving (city, highway, short 3 mile trips)? driving style?
Check the clamps on your boots, don't rely on the guage reading. Also check your up pipes for signs of leaks (soot stains)
Check the clamps on your boots, don't rely on the guage reading. Also check your up pipes for signs of leaks (soot stains)
Fleet Mechanic
Joined: Nov 2008
Posts: 1,573
Likes: 4
From: Seattle
Also, under the same driving conditions, what MPG are you used to getting? Wow, if i could get 12 MPG in town, I'd be quite happy with that. (I also understand 'in town' or 'city' driving could mean anything)
