The majority of posts I have read on this subject on this and other PT Cruiser forums in recent months have indicated that the installation of
STAGE 1 usually improves gas mileage--from 2 to 3 mpg--
depending on driving habits. Is this correct [:I] or are there some other considerations such as type of exhaust, CAI, up-pipe, down-pipe, BOV, wiring, etc., that make the difference? Thanks.
