On summer gas my wife and I average very close to 20 mpg, all stock '99 models. With winter gas we average 15 mpg. Fact of life winter gas gives less mileage.

As far as power and mpg is concerned, with normally aspirated engines, there is no way on earth with more hp you can get more mpg, all things being equal. It's against the laws of physics



Quote Originally Posted by frankd14321 View Post
Ya plugs isn't the problem.. 13 is in the norm.

Also, more power doesn't mean less gas milage always. Depends on many factors. My Mitsubishi Evo was getting 17mpg stock as an average.. now with 150 more hp over stock it gets 24 on average. Best is to have a tunable car and make the engine breath better. But ya the vx is fat and under powered so its going to drink. We get about 17 on hwy and 12 around town.