Not that it's a problem, but ever since I joined up, when I add a fuel-up, on the next screen it says that my average mpg is a few tenths lower than what it says on the car's profile. It has changed with the average mpg (i.e. it has increased as my average mpg has increased) but consistently reads .2 to .4mpg lower. This is also true with the text messages that I get after fuel up by text message. Not that it's a super big problem, just wondering if you guys know about it and what the cause is.