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Old 10-02-2012, 03:35 AM   #10 (permalink)
Frank Lee
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Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
Quote:
Originally Posted by Saskwatchian View Post
With big wheels the best thing you can do for milage is make sure your wheel alignment is spot on and keep a consistent speed on the highway.

16 isn't too bad for a truck like that so I am guessing that you are taking care of it pretty well.

For the high topper I would think about building up the top of the cab starting at the front following the line of the windshield, sort of like an Xterra. If you used foam construction and went all the way back to the topper it could also help keep the cab a bit cooler in the sun.
If an F150 V8 4x4 used only for hauling and/or towing gets better than 16, then I'd say it is too bad.

Then you suggest a wedge on top of the cab is a potential fix. Read the other posts; that ain't where it's at. That cab/topper spot should react much like the hood/windshield junction, and that isn't the evil thing many think it is unless, as Metro alluded to, it has a square leading edge not a radiused one. If that's the case there are simpler ways to correct it, namely adding a 1/4 round segment to the leading edge of the topper.

The alignment and speed things are good tho', so you scored 2 outta 4.

FWIW 3.0 V6 Ranger 2wd a/t = 30 mpg highway. Not exactly the same but still...
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Last edited by Frank Lee; 10-02-2012 at 06:21 AM..
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