Lost MPG
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Cross-Country
Joined: Jan 2008
Posts: 73
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Lost MPG
I have an '02 F150 Supercrew with the 7700 tow package. It's a 4X4 with 3.55's. The mileage never has been good, but it's fallen to 12 MPG. About the best I've ever done on the highway is 15. We use it to pull a lightweight 5th wheel and when we're towing it gets between 9 and 5 MPG depending on the wind. Last time we checked it got 8. No mountains, just north Texas hills.
Senior User
Joined: Jan 2008
Posts: 270
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From: West Covina, ca
You can try monitoring your mpg a little bit better, and try and monitor yourself to get better MPG.
I would recommend getting a scangauge ScanGaugeII
You can see real time MPG and adjust your rpm/throttle accordingly. Have you replaced your fuel filter lately? cleaned air filter? changed oil?
Also, you can get $20 of your scangauge purchase by using coupon code "scan"
I would recommend getting a scangauge ScanGaugeII
You can see real time MPG and adjust your rpm/throttle accordingly. Have you replaced your fuel filter lately? cleaned air filter? changed oil?
Also, you can get $20 of your scangauge purchase by using coupon code "scan"
Senior User
Joined: Sep 2006
Posts: 364
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From: Republic of TEXAS
More Turbo
Joined: Apr 2007
Posts: 562
Likes: 0
From: YYC
has anyone every tried a classic Vacuum gauge.....or "Motor Minder" as they were called in the 70's.....i was telling my dad about getting that scan gauge to monitor MPG's on my 1997 F150...and he took me out to his 1977.5 F150 and showed me the Vacuum gauge which pretty much accomplishes the same thing....if you aren't looking for all the features of the Scan gauge....so i checked the price at local auto store....only $22.51 CAD for that gauge.....anyone think its worth trying?
THNX
Duggy
THNX
Duggy
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Joined: Dec 2001
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From: Louisville,Ky.
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Elder User
Joined: Aug 2006
Posts: 642
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From: Olathe, KS
I run one so I can see how hard the motor is working when in cruise. Very handy. The injector stats will show more. But the vac gauge is a pretty good for the cost and simplicity.
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Joined: May 2008
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I have a similar truck in 2wd and tow a 27' Fifth Wheel. I've never got less than 8 crossing Eastern mountains or more than 10 on flat land while towing with it. I get 18mpg highway unloaded. My mileage deteriorated to 15 highway a couple years back. No codes recorded in the computer but a check showed my O2 sensors were slow to operate. New O2 sensors restored my mileage.
Recently my brakes were dragging due to bad brake hoses and cut my mileage. I couldn't tell they were dragging with the 5.4 and 3.55 rear end.
Recently my brakes were dragging due to bad brake hoses and cut my mileage. I couldn't tell they were dragging with the 5.4 and 3.55 rear end.