:shrug: Hey guys I have an 04 mach1 with a 1.7 kb supercharger with 4.10 gears. the car makes 458whp and 540 crank hp I haven't had the car very long and i noticed that is goes through gas like nothing else ive ever seen. I did a calculation and my car had 13,081.1 miles on a full tank. At half a tank i had 13,154.3 and the fuel capacity is 15.7 gal so what i thought was on 7.8 gallons i can get 73 miles which adds up to 9.3 mpg. I baby my car very much its stick and I shift at about 2500 and cruise at 2k i have a lot of hills where im at so i put the car in neutral and coast down hills usually. I'm not a led foot driver by any means. Could there be something wrong with my tune? what should I do? thx