also, throw out your mileage from your very first tankful. The odds that the dealer truly topped off your tank are low, so your numbers will be off. Having said that, my first reading was 35 mpg, second was 41 mpg in rural driving. We're currently steady at 45mpg (at 3k miles). If you don't get into the 30's on your next tank, keep an eye out for other problems (read the Lemon Law thread).