i have a 97 single wheel 350 4x4 crew cab long bed...automatic, 3.55 gears. i have a wildman chip and k&n filter...everthing else is stock. i am averaging 14-15 mpg..on a 30 mile trip back and forth to work on back country roads mostly running 60 sometimes 65. Does this sound right?

 

Tire size ?


Speedo calibrated correctly?...

 

i am running 285's ...they were on it when i got the truck...don't know if the speedo has been adjusted to tires?

 

Sounds about right depending on how hard you squeeze the go pedal.
Do yourself a favor though- do some research on the 6637 mod, get yourself the needed parts, and throw the K&N in the garbage.

 

thanks.....yeah i've been thinking about the filter change....i did not put the k&n in it....but that's the way it came...i like the larger filter though....i'll give it a try.

i'm debating swapping to a 5 spd tranny....i think this would make a difference in milage plus i've always been partial to a manual shift.

 

Sounds about right. Thats all I get out of mine with the same setup. A 5 sp will take a long time to off set the cost. If you want a thats fine but you won't realize any financial gains for a long time.