Tried to respond from my phone, caused the post to get messed up....anyway. Hey Brian. Thanks a lot for the tip! The first time I did it, same result. It was showing 13 mpg. Gave it a few days, did the reset again, it's showing my avg at 23 mpg. That's right around where it should be, but Im still gonna change out my upstream o2 sensor anyway. Hopefully it will get better.