[misterB27]

I'll be shipping my car to Korea while I'm staying there for awhile. I usually put 91 octane in my car and 93 if they have it.. but in Korea the system doesn't work like that.

What type do I have to put in my M3 in Korea..

Also.. is it okay to put in Korean gas when I have some 91 octange gasoline left in my tank? And also vice versa?