Just got back from a 10 day trip in my 04 6 speed Touring Roadster. Just before I left I got a service engine soon warning lite that turned out to be a bad throttle control sensor sending conflicting data to the computer according to the service department. I used to get ~24 mpg using the cruise control on long highway drives at about 80 mph. After this service I now get 26-28 mpg readings according to the Z's readout which I confirmed at fillups. **** even hit 30 mpg going over independence pass in CO. Don't know what to make of this, as there is no less power. I thought the EPA rating was only 26, never heard on anyone exceeding that. On the other hand, somewhere in Colorado, when I filled up, instead of going about 1/8 in. above the full mark where it usually goes, it only went up to 7/8 full. MPG readings aren't , it just seems like I've got a few gallons less capacity in the tank. I've read about the problem with the filler valve failing, which I'm guessing is whats occurred. I'll be interested to see what my mpg readings are in town driving now that I'm back in CA. Used to get ~18 or so.