I Have a 99 Teg LS with about 73,000 miles. It has AEM CAI, Skunk2 exhaust as far as performance mods. What should my gas mileage be for a full tank. Also im running 17" wheels with a 205/40/17 tire. Does anyone have any idea what it gets when its stock and what I am to expect with these mods. Was gettin just under 200 on a full tank. Just changed the plugs a lil bit ago and did see an good increase. Does anyone think maybe a fuel filter change might help. I bought the car used with about 62,000 on it and i doubt it has been changed.