Bush signed the new standards, the evil is in the fine print. My 2008 RKC has been clocking at 43mpg and it still is not broken in. BUT, the new requirements are forcing oil companies to use even more ethanol. A LOT more ethanol. My owner's manual says 10% ethanol maximum no matter what octane rating the fuel has. I typically buy Chevrom because up until now they have not blended with ethanol. ARCO (now Valero) blends over 10% ethanol, so I won't get near their pumps. So if even the 91 octane premium blends start using 10% ethanol, you know what is going to happen: a drop in power and a drop in mpg. Maybe even constant trips to the dealer for "tuneups."