i just got a 08 F-250 short bed crew cab, just put in 37's on 20's and getting about 9.5 city, and about 12 highway, but it regens about every 75 - 80 miles.

hope those numbers go up with a couple of mods...

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i forgot to say it has 28000 miles on it.

 

What mods would help? 08'/450/6.4/2wd

Thanks!