as for the octane rating i cant tell u i dont sell them but i do work on them and no u cannot use e 85 in them at all i have actually had a hybrid come in with it and it barly would crank and really didnt want to run...honda does not have any vehicles at this time that will run the e85....as for the octane rating just look at a owners manual before u buy it will say but i cant remember that offf the top of my head