I purchased a used 2000 Insight several weeks ago and the fuel mileage isn't what I expected. It is totally stock with 5spd and a/c. Has over 100k on the miles but runs fine. The battery charges as the greeen lights show charging and the yellow shows assist. The battery will be fully charged at times but mostly about 33% full. All of my driving is in town. The IMA light has come on a couple of times but I just unhook the battery under the hood for a couple of minues and it is back to normal. It has been very hot here (97 degrees in the afternoon) so I noticed from your helpful site that can be an issue but I don't feel like it is the only factor here. The auto stop is working fine. I have tried various driving techniques....coasting.......accelerating quickly to speed and accelerating gently to speed...all to no avail. Still 35mpg average. The economy meter will read 150mpg when coasting and functions properly. I have tried premium unleaded gas too. There is no local Honda dealer but I really don't feel like being charged to diagnose it when it runs fine and the system appears to be functioning properly. The maintenance required light is on and it was when I bought it but I looked in the manual and it says that it is only for service and when you take it in the dealer can reset it or you can reset it yourself by turning on the key to position2 and then holding the trip button. I did this several times but would only make the light flash once. When I start the car it is still on. Any suggestions guys and thanks! Also, the lifetime mpg shows 46.5.