I was driving home on Interstate, from Baltimore to Cincinnati, and noticed I was getting way better MPGs than I normally do. 34 mpgs to the gallon. I normally get 25 to 26 on the highway. I hooked up my scanner and my LTFTs were at a -22. They are normally 0 to -2. Does anybody have any idea what is going on? My wideband was in the 14s so I'm not sure what is up. Maybe a bad o2 sensor?