Put a fairing on front cross bar, learn to drive it like its intended. It can get good mpg in auto mode when your not heavy in the pedal. I have been driving mine hard in m mode using air around town and light hwy and usually with people in it and worst I've had was 26. I will say after it hit 7xxx miles it really changed how it ran and mpg. Mainly loosened up and ran much more free and therefore took less pedal to get it going. I changed oil to royal purple at 3xxx miles and use 91 non ethanol oct fuel. That makes a difference in mine where I'm located. In sure some places it might not. This is my first Subaru, now in itching to get a wrx 5-door. Havnt tried intake yet but will. Exhaust I'm not sure what can be done due to PSEV, but I'd be interested in that as well.