GAS MILEAGE INCREASE
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Freshman User
Joined: Dec 2008
Posts: 42
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From: Plant City, Florida
GAS MILEAGE INCREASE
Are there any safe, sound ways to improve gas mileage on the 5.4 ?
I am running a 2008 250 4x4 automatic.
Have heard of several options for the diesels but not much that applies to gas engine.
I am running a 2008 250 4x4 automatic.
Have heard of several options for the diesels but not much that applies to gas engine.
Laughing Gas
Joined: Jul 2010
Posts: 1,025
Likes: 1
From: Clearwater Fl.
There are a few things you can do. You can install a cold air intake, a throttle body spacer (Airaid, Poweraid is best ), dual exhaust from the catalytic converter back, headers would even help as well. These things let the motor breath better. They make a chip that you can set for different things, one setting being fuel economy. I'm sure more people will have some ideas as well. Good luck getting better milage.
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Joined: Jan 2008
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Lead Driver
Joined: Aug 2004
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From: Gilbert
This one actually has a better purpose than what it was originally intended for....paper weight for your center console.
All of those will get you a louder truck and the combined cost will not offset the savings in gas had you just left it alone.
Keep your tires aired up, your air filter clean, and drive as though you have an egg under the throttle.
All of those will get you a louder truck and the combined cost will not offset the savings in gas had you just left it alone.
Keep your tires aired up, your air filter clean, and drive as though you have an egg under the throttle.
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Mountain Pass
Joined: Dec 2009
Posts: 196
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From: Central NY
Put your right foot on a diet. Serious, I can go from 12mpg to 15/16 (in the summer, of course) by just driving easier. That doesn't mean you can't go fast, just don't accelerate a 6000 pound truck like its a race car.
I've also noticed a small improvement by keeping the revs between 2000 and 3000 ... the 5.4s don't seem to like to be run down low. But I drive a manual so I have a bit more control over that stuff.
I've also noticed a small improvement by keeping the revs between 2000 and 3000 ... the 5.4s don't seem to like to be run down low. But I drive a manual so I have a bit more control over that stuff.
Moderator
Joined: May 2005
Posts: 8,226
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From: San Antonio, TX
Contact Mike at 5 Star Tuning, he's a sponsor on the V10 forum but he can tune 5.4s as well.
Believe it or not, changing your gears from 3.73s to 4.10 or 4.30 will help you pick up another 1-2 MPG, especially if you tow or do a lot of in town driving. And you'll be MUCH happier with the acceleration.
Headers, cold air intake or exhaust will do nothing on a 5.4 3V Super Duty.
Believe it or not, changing your gears from 3.73s to 4.10 or 4.30 will help you pick up another 1-2 MPG, especially if you tow or do a lot of in town driving. And you'll be MUCH happier with the acceleration.
Headers, cold air intake or exhaust will do nothing on a 5.4 3V Super Duty.
Posting Guru
Joined: Dec 2007
Posts: 1,361
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Anybody ever heard of a Fitch Fuel Catalyst. Saw an article about it in Off Road Adventures a year or so ago, and they claimed it worked. Something about conditioning the fuel to a standard octane or something like that.
Elder User
Joined: Mar 2007
Posts: 879
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From: at the truck pulls
I would do a K&N filter only, not the whole FIPK kit they sell. It will pay for itself in 3 years no matter what because you reuse it, but my experience in all my gas engines and my brothers 2004 5.4L F150, are that you can get a 1/2 to 1 mpg increase driving just like you do. Not much gain but like I said it pays for itself because you reuse it.
I can't say that I buy the idea/statement that a better exhaust wouldn't help. If you free up the exhaust and the engine works less hard, then you have the option of using less fuel. That said most people won't use less fuel because it sounds better and feels better.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,320
Likes: 13
From: Mid Atlantic
Can't comment on the 5.4 directly but for all our gas vehicles we've gone to synthetic fluids (oil, diff etc) as much as possible and have seen modest improvements in the range of 2-3 mpg's.
Does it cost more? Yes, but in addition to better mpg's the vehicles are better lubricated which hopefully will result in less wear and tear and fewer problems down the road.
As far as which oil we use I'm not goimg to say as I don't want to start an oil war..
...pick your own as they are all better than the dino's...
Does it cost more? Yes, but in addition to better mpg's the vehicles are better lubricated which hopefully will result in less wear and tear and fewer problems down the road.
As far as which oil we use I'm not goimg to say as I don't want to start an oil war..
...pick your own as they are all better than the dino's...