I have a 2007 HCH it was getting great gas mileage...44mpg city/highway. Last June 2010 I got new tires and Honda did a upgrade to the computer. All of sudden I was getting 30 - 32 mpg. I called Honda and they suggest it was the new tires, well last week I changed my tires for tires made for hybrids. I am still getting 30-32 mpg. Looks like Honda scewed up...the problem is the computer upgrade they did last year. How many of you had the upgrade?? then got bad mpg. We all need to get together and get a class action suit against Honda so they will correct the problem. I am very unsatified with Honda at this point in time we all paid extra for a hybrid and got screwed. Either fix this mess or refund us the extra money we paid for a hybrid.