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Message: <blockquote data-quote="veggiemike" data-source="post: 445233" data-attributes="member: 9226">Hey, now that gas is so expensive, I wanna re-examine the list of things I've been "gonna do" to my '95 GT convertible. Any idea how each of the following will effect my gas mileage? Each thing should result in a little power gain, which in my inexperienced (hopeful) view of the universe should translate to better gas mileage... 1. Change timing and switch to premium. Will the mileage increase (if any) offset the increased cost of the gas?2. JLT cold air intake. I was gonna go with the BBK one, but there's been some nocks on it regarding heat soak.3. Underdrive pulleys.4. Exhaust. Was planning on switching to long tubes, catted x, and flowmaster catback.5. H/C/I. I'm nowhere near doing this one yet, but I'm curious. Say I use something equivalent to the trick flow top end kit with 24lb injectors and a 70 or 75mm tb. (Aluminum heads would reduce weight, too)6. Suspension. I know tire pressure can play a huge role in gas mileage. What about the suspension at large? Will new shocks/struts/springs or other suspension parts make a difference?I've been planning on doing all this since I got my stang... I just haven't had the money or the time and keep putting it off. But if some of these really would increase my gas mileage, it'd be easier to justify doing (and I want to!).</blockquote>