Well my car has come back from the dealer for the 4th time & the oil leak is coming from the breather at the top of the diff. Subaru are working on a modification & will be sending the mod kit to the dealer in the next few weeks. Regarding the fuel filler cap, mine doesn't open either, again their is a mod subaru are working on & should be at the dealer soon. Until then i have to just put up with it...