i know that it says it requires at least 91 etc..etc.. heres my problem; as i filled up with gas today(46 bux for 11.5 gallons) i was talkin to the owner and asked him why premium was 50 cents more a gallon than regular.. he told me it was becuase in the area premium is very very hard to come by now and by next week he(and the surrounding gas stations) may not have any. (this is in pennsylvania by the way). so my question is, if i had to, could i run a bottle of octane boost with 87 or 89? and i dont beat on my car cuz i cant afford to, i drive about 80 miles a day so i need to squeeze every ounce of mpg out of it.