Lousy mpg, I think
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Junior User
Joined: Jun 2009
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Lousy mpg, I think
I recently bought a 07 XLT SC LB with a 5.4L. It has 3.55 gears and 46K miles on it. Ironically it gets the same mpg as my old 1990 XLT Larait: about 10 mpg. Most of my trips are at least 20 miles to get to town, running around, then 20 miles back.
What do I check first?
What do I check first?
Postmaster
Joined: Jul 2010
Posts: 3,743
Likes: 2
From: Henrico, VA
Well you really aren't going to improve it that much because you have the 5.4 but the 3.55 gears. But you could look into replacing your fuel filter. Most likely this hasn't been done yet. Run the fuel cleaner through the system with your next oil change this will help to clean out the engine some. What kind of tires do you have on the truck currently? Changing them to a better tire will improve the ride of teh truck and should help with MPG's as well.
Sorry we don't have better news but these trucks aren't great on the gas.
Sorry we don't have better news but these trucks aren't great on the gas.
Postmaster
Joined: Jul 2010
Posts: 3,743
Likes: 2
From: Henrico, VA
Well with those tires you would think it would do better. I would change the fuel filter and do the seafoam down the intake. The filter is supposed to be replaced about every 30k I think. Maybe a TB and fuel line clean out service will help to.
Anyway I hope you get something worked out.
Anyway I hope you get something worked out.
Hotshot
Joined: Feb 2003
Posts: 11,537
Likes: 27
From: Long Beach, Ms.
Yes 10 mpg is on the low side. But not unexpected with short runs.
What are your driving habits?
How are you measuring the consumption?
Are you using ethanol blended gas? That has a really detrimental effect on mpg.
What are your driving habits?
How are you measuring the consumption?
Are you using ethanol blended gas? That has a really detrimental effect on mpg.
Thread Starter
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Junior User
Joined: Jun 2009
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I fill up the tank, reset the trip odometer, run the tank almost to zero gallons, refuel. I note how many gallons I put in, see how many miles I went and do the math by hand.
The truck doesn't an onboard mpg gauge or whatever.
The truck doesn't an onboard mpg gauge or whatever.
New User
Joined: Jun 2005
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I have found keeping mine (04 Lariat Screw) gets MUCH better mileage if I keep it under 2000 rpms
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Sick 'n Tired
Joined: May 2006
Posts: 2,969
Likes: 47
From: League City, TX
Like others said, get that fuel filter changed. Also, check the air filter, tire pressure, oil level (keep it changed at the proper interval) and make sure sure you're not toting around extra weight (get that bag of quick-crete out of the bed).
You might also get the brakes looked at. Every so often a caliper or e-brake gets stuck.
You might also get the brakes looked at. Every so often a caliper or e-brake gets stuck.
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