So very shortly after my last post I received my injen CAI. So of course I had to install it. But I only istalled as a sri. That way filter would be getting hot air as a k&n would. Plus its the rainy season so I didn't want to worry about water. After a full tank I was pretty much running 34 mpg even. Better gas mileage defiantly if mainly highway. The big difference I noticed between the 2 setups is that it is a lot easier to kill gas mileage in stop and go than with stock. Could be because of filter placement and the fact that it is all hot air. Once driving though there is air flow and mpg shoots way up. Right after fill up I hit the highway and once at cruise for about 20 minutes i hit 37.5 mpg. Never touched that mark before.