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Old 12-29-2011, 10:43 PM   #40 (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)
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Quote:
Originally Posted by oil pan 4 View Post

Tire weight isn't as much of a factor as every one claims it is.
Taller tires with less rotations per mile (lower cruise RPM) seems to be where the real savings are found.
The only time taller heavier tires might hurt you is if your vehicle is so under powered it has trouble turning the size factory tires and maintaining or picking up speed.
Big Dave and I and countless others have found that bigger heavier tires on pickups don't lead to fe gains.

I think that's especially true on trucks with overdrive. Some of the real old school stuff with slushboxes and no overdrive could maybe benefit though. I think my a/t Tempos benefitted from going up in diameter ONE size.
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