i am having a hard time believing how good of gas mileage i am getting. i don't baby my car but don't beat it either. the most i had ever gotten for mileage was 28 mpg on a straight interstate at 65mph with 40 pounds of air pressure in the tires. i usually got 26-27 depending on what roads and how i drove. very little city driving. i live near small towns. i changed the rear end fluid last month to Valvoline full synthetic 75-140 with 7 oz of CRC Trans-X posi-trac additive. i have 31, 550 miles on the car with original gatorbacks. the last two trips, both over 300 miles, i got 29.51 and 29.67 miles per gallon, filling up at the same pump at the same station in the same direction. the trips were combined between 2 lanes at 60 and 4 lanes at 67 mph. i am riding alone and weigh about 230 pounds, with 35 in the tires now. just curious what other people get with the 99-2000 year GT's. i have talked to the owners of the newer styles with the different transmissions and the hood and side scoops and they can't get 23 mpg on the hwy. i have a t-45 tranny.
- posted
17 years ago