[Tcoat]

Originally Posted by Zhangy

https://books.google.ca/books?id=afY...octane&f=false

https://www.google.ca/search?q=inter...+%2B+standards

There are internal combustion engine design standards which must takes into account of fuel octane volatility and knock management. I've only read it briefly, but I assume 87 octane satisfies internal combustion engine design standards. because sometimes the 91 octane you buy will be like ~88 octane anyways

LOL The very first complete sentence of the material you provided debunks you theory completely!