Just drove my older ('01) Insight to work this morning to keep it excercised and was surprised at how much better FE it seems to get. Came in on the freeway at 60mph rather than my normal country road commute and was able to get 95+mpg. With my new ('04 with ~7,500miles on it) Insight, its a real effort to consistently get 95mpg, even on the country roads at 35mph. Using the freeway it's tough to get 90mpg.

The first thing I'm going to do when I get home is check the tire pressure on the '04 - perhaps it has drifted down from 50psi. However, I'm wondering whether I might be experiencing some break-in related reduction in FE. I know - I shouldn't be complaining about 90+ mpg, but the difference was so striking to me.

Does anyone have any input on the break-in period for an Insight?