Highest Octane For Stock Motor? Jul 21, 2004 14:06:21 GMT -5 Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by yb200cc on Jul 21, 2004 14:06:21 GMT -5 Adam said:yea its either 84 or 83 its in the 80's thought around that area i was just in a hurry when i posted this n didnt feel like gettin the exact numberit's 89 octane