I run 78 octane and pigeon blood, it balances out.....

 

I use 98, mite use 95 though, advantages vs disadvantages anyone????

 

i haven't even gotten a chance to fill up yet..haven't even filled it for the first time ...the cars been at the dealership since tuesday to get ipod adapter installed...their system keeps crashing that's what they tell me...eeh' i can't complain they gave me a 09 X5 brand new loaner...so i'm having the time of the life with that...but i sure miss 550