[scrubjaysnest]

I have to agree with the above. I have really noticed what harveyrv is talking about. DW's Cherokee on the interstate, flat, in Fl is hard pressed to get 19 mpg. Once we leave get a fill up outside Fl MPG goes to 20. This is running 67 mph, at 70 it drops at 65 it drops. This is also running regular with the 10 to 15% ethanol which only helps the farmers IMO. So what is the difference when we leave Fl and get that first out of state fill up? The K & N will help the land fill, but here in Fl when I've run them in the past I didn't see any change in performance.