I've been trying an experiment the last month or two.

I filled up two tanks... same gas... same gas station.

The first tank we hypermiled the best we could.

The second tank we drove normally without a fanatical obsession to hypermiling.

End results... our MPG was almost the same.

The good aspect of this is that the Altima hybrid seems very forgiving for those of us who aren't masters of hypermiling. The bad side is I really wanted my fanatical devotion to hypermiling to show better results.

What is odd is that early on I saw a bigger difference between hypermiling and not, but now that the car is broken in the results don't seem as different.