You need to hand calculate the tank on a few refills to really see where you are. I reset now every tank... and it can be accurate... but it can also be WAY off. I haven't figured out the mojo yet of what makes it dead on one day and not another. If you are a lead foot driver... your MPG will reflect your driving style. We find nowadays that we do consistantly 35-36 mpg when we aren't too careful about how we drive.

Gripper made us all aware of the fact, also, that heat over 100 kills MPG. With this knowlege... I found that "time of day" actually heat conditions on the road really affect results. If I drive in the morning when the roads are cool... I got better MPG than when I drove at high noon on a hot day.