Looking for the best ways to increase mileage on my 03 F250 6.0 4x4.. obviously intake and exaust, I'll take all advice!!!! And also looking for replacement fender wells for rear... I know I have seen after market solid single piece fender wells but I cannot find them anywhere!!! the stock ones did not make it the last time it rained... Thanks for all the help!!!

 

I think I'd look for a replacement box...as for increasing mileage,my experienc has been that it's a real long shot.I had a '94 F250(gas 351W) getting around 11-12 mpg...sometimes 10.After years of restoring it,I bought a 2010 F350 KK new,with the 5.4 Triton,that gets 12.4-13 mpg.It cost me $47K to get home,everything incuded.If I'd had it to do again,I think I might have held onto it.The new truck's depreciation alone at this point,would have been more than enough to substantially make my old '94 real happy....$$$$$!

 

Have you looked into software (chip) upgrades? portland 2007 volkswagen jetta 2.5

 

SCT tuner with economy tune, higher flowing intercooler, and a little bit of cetane booster (i always used Diesel Power Service)