I'm getting ready to cross the 75k mile barrier soon. Bought in in Feb of 2013 so it's a little over 3 years old. Haven't reset the avg MPG reading in ver 50k miles and it says 34.0 right now, can't complain even if it's being optimistic since my commute in and out of Boston each day is all traffic.
Wow nice. I usually reset the MPG reading every tank. I'm averaging around 30mpg over the life of my car according to an app I use. This is in Miami highway traffic.