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Again, I hate to beat the dead hoe.......BUT.......
to all:
1. The name of the game is rpm at 60 or 55 or what ever you 'cruise' at. In my Q45, w/ the 2.78 ratio and the one size up 255/45/18, I'm turning 1820rpm at 62mph. On a flat freeway, that will get me 30mpg all day long. At 2000rmp the mpg drops noticablly.
2. Again, why lower it. REALLY. why? I can tell you from firsat hand experience there is no noticable difference in mpg w/ lowering.
3. BUT your ride quality will suck. period. So knock your self uot. use lowering springs. what ever. But you will regret it. the spring is the major component in the suspension. the minimal change in tire size has very little impact on the quality of the ride. A 1 inch change in springs is not a little thing.
4. Besides, if you measure the current ride hieght with the factory ride hieght, I bet the car sits 3/4" lower right now!
5. a much better option (if you are convienced that you have to be lower is a front lip or airdamn. So of the truck-modders have really mastered the art of the lower front dam.
and they still have the factory ride quality.
Why suffer a worse ride, that cost you 3-400 dollars to lower, when there is 0 payback in terms of noticable mpg???
(ps. fud this was not directed at (you). it was aimed at the other posters.
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