Well, so much for bragging about my 1st tank. I'm only 250 miles in after 10 days, but averaging 35 mpg. I'm in the hills in Los Angeles, so I gain mpg coming down the hill to work and watch it all go away chugging back up the hill @ night. Per my salesman, the 1st tank average for his TCH customers has been closer to 27, so I feel good about that. (not that I'd be competitive about this sort of thing.)