What a Difference Air Makes

You might remember me [complaining about poor MPG and performance](http://dbmini.us/r50-vs-r56-bruce-takes-las-vegas/) on the drive to [AMVIV](http://www.amviv.com) earlier this year. Then, you might remember that I [upgraded](http://dbmini.us/making-better-air/) my air filter from factory to K&N (because K&N). I’ve been monitoring my MPG since and that small changes has been giving me about 2 mpg per tank during Phoenix […]