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Old 07-22-2011, 10:36 PM
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what should I expect to see

I have an early 99 F250 with a 8in lift on 37's. I am going to be pulling a bumper pull 18ft enclosed lawn trailer at weight of about 8,000lbs altogether. I have a 6637 mod, 5" exhaust, and a dp tuner chip. I am curious what fuel mileage I should expect to see. I have been doing a debate in my head to lower it or keep it lifted (really like it lifted) but wanna know how much different my fuel mileage should be. Thanks all for you help.

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Old 07-30-2011, 02:31 AM
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The big tires and big lift are both detrimental to the best fuel mileage.

Exactly how much difference can only be determined by your actual usage.

Generally, factory-sized tires and suspension will get you the best mileage, but many folks get bored with the ways of economy.
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Old 07-31-2011, 10:46 AM
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your milage will depend more on how you drive then being lifted. That being said if you drove the exact same way, just the resistance of wind and bigger tires being lifted cost you 2-4mpg towing or so. If you go through the expense and work of taking it back to stock, it will take a long, long, time to pay you back for your parts in labor in 2-4 mpg savings.
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