Ocd: did you get that part in the manual? The part where Yamaha wrote.... Well If you happen to stroke, change or what the hell... Swap the engine to any displacement you should still use our recommended oil, spark plugs and gasoline.... It doesn't matter if the spark plugs is to short, you use it anyway.... Because that is what we say........hate to say it, but the European rewrites of the manual must have eaten that part
No, I got it from seeing this exact same flucking question asked on the forum every other flucking week and then seeing a different recommendation from every single flucking person, none of which have any more of a flucking clue than the next! And if that's not bad enough, there's always one more guy, who says he read all those flucking threads, but yet still insists on starting yet another flucking thread, asking the same flucking question, and, get this...actually expects to somehow get a different flucking answer! Like he magically found a way to word the flucking question that maybe, this time, finally, we will weed through all the flucking BS and come to a definitive answer. There is no flucking definitive answer! Use what you like the smell of, can afford, have access to, doesn't give you a rash, whatever! If it carries a TCW3 rating, it's more than adequate for 99.9% of riders. If you have an engine builder, go with whatever he recommends. Just please for the love of all things holy, stop asking this flucking question here and actually expect an educated answer.
Whew, that felt good to finally get that out, lol. I actually composed that rant bit by bit over the last 10 years of watching the discussion on oil repeat itself like groundhog day, I just figured it was nicer to post the batman meme. Sorry it had to land on you Per, nothing personal so I hope you don't take it that way.
Personally, I use Quicksilver Premium Plus at 32:1 in both my ported 760 and in my SS865. Most say it's a cheap oil and it is but my engines are spotless when I tear them down. It's a good middle of the road semi synthetic at a very reasonable price, (around here anyways).
My top choice of oil for high performance 2-stroke applications is the Bombardier line of XPS synthetic and semi synthetic oils. Bombardier gets more hp/cc than any other manufacturer and they achieve this by designing the best oil on the planet. That being said, I don't believe our Yamaha engines, even bored and stroked, are even close to requiring this class of an oil.
Here's a good read on oil.
http://www.sea-doo.net/the-late-great-oil-debate/2015/04/
