The Petron station out here sells ethanol free 100 octane. Is high octane bad for the VMAX?
This question has come up before. There seems to be a myth that higher octane fuels provide better combustion, better performance, etc.
According to the articles that were linked to in the previous threads, higher octane fuel actually have a higher ignition point, are designed for high compression engines, and are actually only useful in lower compression engines that are experiencing pre-ignition conditions, which doesn't seem to be a problem with a stock Max.
The OEM recommendation for all year Gen 1's is
regular fuel, with an octane rating of 87.
I believe using high octane fuel in a stock max is a
waste of money. I trust Mother Yamaha to know what's best for my bike.
I only use high test when I lay up the bike for the winter, only because, in my province anyway, all high test is
ethanol-free.
Cheers!