1998 chevy mpg?
 

I just bought a 1998 chevy 2500 it has the 350 in it, has 170,000 miles on it. i just had a tune up on it and i am still getting 12 is this normal? or what should i be getting and is there anything else i can do to increase the mileage

RE: 1998 chevy mpg?
 

Welcome to the forum!!! What rear end gears do you have?

RE: 1998 chevy mpg?
 

3.73

RE: 1998 chevy mpg?
 

Do you have stock size tires?

RE: 1998 chevy mpg?
 

no i got 265/75R16 on it now stock is 245/75R16

RE: 1998 chevy mpg?
 

What kind of driving are you doing mostly? city? highway?

RE: 1998 chevy mpg?
 

highway about 36 miles round trip

RE: 1998 chevy mpg?
 

like mr. northey has asked for nothing but city driving lots of stop and go. that would probably be about right. but if thats with nothing but highway driving i would start thinking that the tires need to be downsized. is it an auto trans or stick. one thing you could do is go through and change all oils, to synthetic, something like mobil or royal purple.

RE: 1998 chevy mpg?
 

12 Maybe normal with 3.73 gears, mine gets 15 highway with 3.43 gears andI bet your truck a little but heavier than mine.

RE: 1998 chevy mpg?
 

its an automatic and all that i do run and all that was run before i got it was synthetic