Can't seem to break the 60 mpg barrier

[Amdkt7]

On several of my trips home from work my average mpg has risen well over 60 mpg, but the final leg of my drive knocks off 3 or 4 mpg. Twice I have gotten 59 mpg. I might have made over the top yesterday, but on my glide down the big hill a couple of cars hogged both lanes and I had to slow for them.

My best tank so far has been 47 mpg (confirmed by both the scangauge and by calculating miles driven and amount of fuel required to fill up). So far my scangauge is showing an average of 51 mpg for my current tank.

My trips to work are more up hill, but even today I got 53 mpg. The hot weather seems to really help my glides. There has been little wind.