Has any one else on here done a fuel economy build? I use to have a modded "for fuel economy" civic vx I wish i had never sold it and now can find one worth buying. I am now driving a 1999 honda civic ex automatic. I have been looking around for a 99-00 hx but cant find one of those either. With my ex im getting 28 city 35hwy. The vx was 46/53. Im thinking about keeping the ex and doing a 5 speed swap with a vx/cx tranmission and hopeing for 40+ mpg!