Octane number is a measurement of fuel’s resistance to engine knock. Engine knock is an abnormal combustion associated with using gasoline with too low of an octane number. Ordinarily, your vehicle will not benefit from using a higher octane than is recommended in the owner’s manual.
Thanks for your posting and Frank's opportunity, but I am still waiting for Mousecatcher to state HIS position on why he thinks "Just a clarification, higher octane fuels do not have a slower burn rate. octane is not related to burn rate. "
Would like to hear the basis of his "clarification".....
76 Station off the 5 FWY. I can't remember the exact exit but it's the one right after Alicia going south on the 5. I'll look up the exact exit and get back to you.
While searching for the exact location of that 76 station I was able to find this on an M5 board.
Well it appears mousecatcher has chosen to not respond to my request to support his clarification claim above -- which is incorrect. Guess the "cat's got his tongue".
Higher octane fuels DO burn SLOWER and thus reduce the probability of spontaneous combustion (knock) from the fuel-air charge as it burns in the combustion chamber. And for clarity here I am talking specifically to "chemical" octane as differentiated from "mechanical" octane which is inherent in the combustion chamber design.