Great Website and information! I just bought a new 2007 HCH with nav. I searched the FAQs for this site, please let me know if I missed the answers to the below.

Is the mileage database here based on gallons/miles driven calculations (how we used to do it before onboard computers), or the avg MPG shown in the trip display?

I ask this because my trip display MPG for my first 70 miles is much below what I had expected and much below the MPG shown in the database. Perhaps the trip calculator is not as accurate?

I am getting about 28 MPG. Not what I expected. I have read a few posts here and see that if I modify my driving habits that I may get higher MPG. I wish I had read this before purchasing this car.... I expected that with normal driving that I would get significantly higher FE than my Toyota minivan, which avg 21 MPG with the same kind of driving. I don't see 28 as significantly better, and I have already been coasting and modifying my driving somewhat. Does that mean that if you drive a hybrid and non-hybrid exactly the same way, the hybrid technology does not buy you that much?

Does the car need a break-in period to achieve higher FE? Maybe this is my issue.

Or my other possible conclusions are: 1) there is something wrong with the onboard calculations, or 2) I have a lemon?

I am willing to modify my driving habits going forward in the interest of the greater good (that's why I bought a hybrid in the first place). However, I wanted to see what kind of improvement I would get first without any hypermiling, coasting, etc.

Thanks for any help!