Before my trans and intake manifold went in I got around 15-16 miles to the gallon now I'm getting 13 with mostly highway miles! I just wanted to see if my car needs tweeking or if it's the norm.
yeah.....got some basic bolt-ons, just redid my exhaust with flow-tech from the headers on back...shortly thereafter did a full tune up and when all was said and done...i have gone from 200 miles on a tank to 230 miles on regular pump gas. so....its not super but i am happy with the improvement
o/r h-pipe, flowmasters, underdrive pulleys, throttle body, cold air intake, and a couple other lil bolt ons havnt takin my mpg down, i still get 18-23 mpg in my 88 gt 5.0
I calculated mine and it was 23 mpg on one tank...drove it like a granny...and half of that is city driving...I really don't think I got that good though...I think my odometer reads wrong or something...