I own a 1994 isuzu npr with 115,000 miles on it. I bought it back in 2001 and it had 110,000 on it when i got it. I drove it from 01-05 not much and let it sit for 2 yrs but would start it and drive it down the street every 3-months.
I have since been driving it again from feb 08 till now. It runs awesome turbo works great, but I cant seem to get better than 12mpg and thats never breaking 55mph either if i do im about 11mpg, it will hit 75mph. I would love to get 15mpg+ any suggestions??? I did notice a small black ring on the out side of my exhaust tip like carbon bild up!
Please help me!