回复：穷人开破新车，也不至于找抽吧

do not worry. gasoline is commodity which does not differ too much from station to station. there was a post by ifidontlike, i think, regarding the gas quality among different chains.
permimium gas is really for sports car or some cars with the engine that requires higher compression ratio. for most of other cars, regular is just fine. putting in premimium gas is really just wasting your $$$ and with no added benefits except making you feel good i guess:)

good luck