im betting he's just taken it for a joy ride and will probably dump it somewhere once he's done with it
cant see what else he can do with it, its stock standard so he cant strip and sell aftermarket parts
never let anyone "test drive" your car unless 1) your sitting with him and 2) have his license in your hand or atleast take down the details off it
fkn scum i have very little sympathy for people who do this kinda shit, i sure hope he ends up wrapped around a tree or something, but then it'd be a waste of a decent car...
g'luck with the insurance thing if it doesnt show up...