Owner of a 2005 HCH manual, living in northern MD, somewhat hilly environment but I do mostly higway driving. I will start by admitting I do not read all posts, but I see a recurring theme of discussion about mileages exceeding 60+ and even 70's for HCH's. With that caveat, I hope this is not a redundant thread.

My question - are people manually calculating their mileages on a tank-by-tank basis, or are they basing their input to the forum based on the estimated mileage shown by the dashboard computer?

The reason I ask is that my computer typically estimates my mileage about 2-3 miles per hour higher (consistently) than what I get by manually calculating based on miles driven divided by gallons pumped at the station. Example - filled up this week; 400 miles and 8.48 gal. This is a bit over 47. Computer said 51. I have not reset my Trip B odometer in almost 10,000 miles and show 48.4. But since I was only averaging 44-45 this summer with the AC on, I have to assume that real mileage is lower.

I do see improvements when I can drive on the MD eastern shore (can you say FLAT?). Is that a determining factor here? I saw 75 mpg on the computer once, but I had just filled up and practically coasted downhill to my house. My concern is that prospective buyers may be seeing mileage numbers that are somewhat misleading in our attempts to promote hybrid technologies (once again with the caveat that I have not read this entire forum database, and therefore may have missed statements about how mileages should be calculated by forum users.)

Regards,

Safety Guy