average mpg with large tires

[powerhook5]

Hey I am a new member and I am just looking for some imformation about mpg. I have a 01 f250 7.3 I currently have 35/12.5 tires and i average between 13 mpg. Is this the normal average for larger tires and is there I could do to get better mpg rather then buying smaller tires? Thanks

[460+]

It just depends on what gear ratio you have chances are you have 3.55 or 3.73 so you will loose a few mpg.

[slammedSI]

Im not to sure on the 7.3 side of things. But I have 315-70-17's and went from 18-20 on the highway to 16.22, just did the math too. so yeah i would say thats about right. Im really thinking about going back to the 265. maybe 285.

[Banshee34]

On a side note.....

[Raul@Stealth Automotive]

that sounds about right... but remember if you havnt re calibrated your speedo for the larger tires your MPG will be off... cause your traveling more miles than the speedo says.... im getting around 14MPG with my 37's with stock gears... when i was stock mode i was getting 16-17MPG

[jhp7.3]

on the high way i'm getting around 17 mpg.
3.73 gears
had the speedo reset for the tires
runs about 2200 rpm @80

[powerhook5]

i have factory gear in mine I bought the truck less then a year ago the guy just put these tires on and a 3 inch leveling kit. I put a afe intake on and a superchip and havent seen any differents at all really. I am looking for better mpg

[sirnunya]

put an exhaust on if it does not already have it. 13 is probably mostly city driving right? with your set up i would assume 16 or more on straight highway runs. im lifted 10in, 38in tires, and 4.88 gears. getting 11-14mpg depending on how i drive....