Mileage drop after tire swap - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 8 (permalink) Old 04-27-2012, 05:42 AM Thread Starter
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Mileage drop after tire swap

Hey guys I've got an 05 f250 4x4 that I bought itbone stock with 115k on the clock, drove it for 5 months with the Bfg rugged terrains 265's. Replaced them in Colorado after one blew apart, Replaced them with nitto terra grapplers same size and went from 15.5-16 city to 12.2-13 city. Anybody else have this trouble?
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post #2 of 8 (permalink) Old 04-27-2012, 05:56 AM
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Re: Mileage drop after tire swap

Hand calculated or overhead? Its possible you might see a VERY slight difference due to extra drag and or weight from a more aggressive tire but I dont see how you could manage that much of a difference without have a brake dragging or something.
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post #3 of 8 (permalink) Old 04-27-2012, 06:04 AM
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Re: Mileage drop after tire swap

Was your original mileage figured while driving in Colorado? Mountains kill mileage.

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post #4 of 8 (permalink) Old 04-27-2012, 07:50 AM Thread Starter
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Re: Mileage drop after tire swap

Mileage is based off both hand calculation and what the truck says, generally with-in 1mpg of each other. The drive in colorado was back in December/January and was on the eastern flats. Fuel mileage hasn't improved and I live in Houston tx. Pretty much 75-80% city type driving.
Thanks guys
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post #5 of 8 (permalink) Old 04-27-2012, 07:53 AM Thread Starter
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Re: Mileage drop after tire swap

Oh on a side note my brother has had the same type of mpg drop on his cummins but at first I attributed that to the bigger tires 265/75-17 to 285/80-17 (34's)
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post #6 of 8 (permalink) Old 04-27-2012, 02:12 PM
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Re: Mileage drop after tire swap

Quote:
Originally Posted by sradams21 View Post
Mileage is based off both hand calculation and what the truck says, generally with-in 1mpg of each other. The drive in colorado was back in December/January and was on the eastern flats. Fuel mileage hasn't improved and I live in Houston tx. Pretty much 75-80% city type driving.
Thanks guys
The mileage drop in Colorado may be due to winter fuel.

Rusty

1997 F250 CC/SB 7.3 PSD 4X4 XLT, 248,000 miles
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post #7 of 8 (permalink) Old 04-27-2012, 04:53 PM
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Re: Mileage drop after tire swap

tire air pressure makes a big difference


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post #8 of 8 (permalink) Old 07-23-2012, 06:09 AM
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Re: Mileage drop after tire swap

I have an 04 that had +1 Michelins when I bought it. a few months in I swapped out tires for BFGs and my mileage went from 15-18 down to 12-14. An Edge Evolution helped me get to an extra mpg but that tire swap killed my mileage.

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