Want to get some thoughts on this. Automatic Turbo coupe and am wanting to get better highway mileage. I hear the 5spd cars with 3.55 are getting around 28 mpg So I am contemplating 3.27 gears to try to get 30mpg. Anyone ever try this? I am thinking it will put 65 mph around 1400 rpms Right now with 373 it is about 2500. And I am around 20 mpg.