Originally Posted by Goofyguy
Once the car is started you can drive it till you shut it down. As for the settings, are you sure you have the settings saved on both keys?
I've driven without the keys (albeit intentionally), but I've never had the car clear my settings as a result. Give the other key a shot and let us know.
It is disconcerting , isn't it? To know that you can drive 500+ miles, stop to fill up, then realize you left your keys on the counter? :-). It certainly makes you perfect the pre-departure-pocket-patdown.