I noticed the average MPG in Dashboard is way off on one of my vehicles. It sits at 22.8 right now even though 9 out of the 10 fill-ups are much higher and only one is 22.44. My actual average MPG based on the last 10 fill-ups is around 25 MPG. It shows correctly if I go to my profile so it's some kind of Dashboard bug I guess.
Matt is correct. The dashboard shows the average of your recent fillups, the garage page shows the lifetime average. Personally, I like to compare the two. It shows how well I'm doing vs what I've done in the past. I always like to be improving.
Well, I know what I see and the AVG on the dashboard is NOT correct. I KNOW it's the average of the last 10. BUT my current average on the dashboard is 20.8 when the lowest MPG ever recorded for that vehicle is 22.4. Do you see how this doesn't make sense even for the last 10 fill-ups?
Also, the AVG on the dashboard keeps going down with every subsequent fill-up. It almost looks like it adds the gallons but not the miles. Hope this makes sense