Fuel Mileage Help

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Old Aug 3, 2005 | 02:52 PM
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99EMBREY's Avatar
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Fuel Mileage Help

Anyone know the best thing to help fuel mileage on a 04 f150 supercrew 4x4. I've already installed the K&N drop in filter. That picked me up from 15 to 16.3 mpg. I have the 5.4L 3V with the 3.55 rear gear.
 
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Old Aug 3, 2005 | 02:55 PM
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From: Burleson/Athens/Brownsboro, TX
Take off slowly and drive a maximum of 60 MPH. Actually, you are getting very good mileage for a 4x4, so you may already be doing that.
 
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Old Aug 3, 2005 | 04:25 PM
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16.3mpg average isn’t bad at all in a Screw, that about what I get and I’m happy as a kid in a candy store with it. There are some real horror stories on this forum about fuel economy; the 8 to 12 range; (that’s scary stuff in a stock truck) check them out, you’ll feel better about your 16.3mpg afterwards

There’s several bolt on mods that will help increase gas mileage, for instance e-fans are good for 1 or 2mpg and custom tuning is good for a couple if you can keep your foot out of it. Just about any mod that increases hp will give you better fuel efficiency as long as the driving style stays the same.
 

Last edited by jpdadeo; Aug 3, 2005 at 04:28 PM.
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Old Aug 3, 2005 | 05:37 PM
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I'm getting 14.5mpg. Bone Stock 4x4 5.4. Enjoy your 16+. It's a truck...not a honda accord with a 2.0 4liter engine.
 
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Old Aug 3, 2005 | 06:03 PM
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My 5 mile city commute to work nets me 11mpg or less, 14.5 is the best road mileage I've seen at 70-80 (SoCal freeways). Not real happy.

I sure wish they'd come out with the 4.5 PSD (6 cylinder version of the Power Stroke) in the F150 - I'd buy one today!
 
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Old Aug 4, 2005 | 12:50 PM
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Hi 99EMBREY,

You are already getting *excellent* MPG from a 6000 lb SuperCrew 4x4 -

And by the way - I very seriously doubt that any drop-in air filter actually brought the MPG up from 15.0 to 16.3 MPG - that just doesn't happen. I can guarantee that something *else* was going on there to give a 1.3 MPG gain in a 3-ton truck, as if all it took would be a drop-in filter, then we'd be selling them by the thousands, trust me.

It's more like a combination of factors, including a higher energy content fuel being used to get *that* kind of MPG gain in a 3 ton truck - or a different route, cruising versus non-cruising, etc - something else was involved, as a drop-in filter just does not deliver a 1.3 MPG gain in a 6000 lb SuperCrew 4x4 - we know, that is what we do for a living, modify these F-150's.

For example, you never know when the same station changes fuel formulation, which can cause the MPG to either go up OR down, we see that type of thing happen regularly, and it really surprises the vehicle owner as they have no way of really knowing when things like that happen, other than the obvious clue of the MPG change they observe, and are either happy or unhappy about it - sounds like yours is one to be happy about!

In terms of increasing the MPG, use the SEARCH feature here to look up & read past posts on that topic, we've covered all of that many times before - the common types of mods that have the best MPG gains are converting over to our electric fan kit, and our underdrive pulley set - both will reduce parasitic losses and net about a 25 Hp gain at the rear wheels as well. Our custom tuning can also help, as we are getting gains like 25 Hp at the rear wheels on just 87 octane fuel, for example - and anytime you increase power, if you keep your foot out of it you have the potential for improving the MPG.

And of course, make sure that you are running your tire pressure as high as you can tolerate it without getting abnormal wear on the tires, and a good alignment on the vehicle - you know, all the basics.

In our 2004 SuperCrew 4x4 Lariat, before the supercharger we did get it up into the 22 mpg range **when cruising at 65 mph-70 mph with the A/C on and using the cruise control** - but that was with tuning, intake, exhaust, headers, e-fans & underdrive pulleys, too, and was on a cruise, that was not an overall average number.

Good luck!
 
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