justin_o_guy wrote on 12/31/69 at 16:00:01:Phelonius, I have read some of the things you say. You seem like a plenty decent type. Please don't take this as a personal shot. That notion, while the rationalization on the aded expense is understandable, since the difference in $$ is so low per tank, it's still a waste of $$ & the engine benefits not one bit. The only difference is octane. maybe an additive package difference, but nothing that would change the life of the engine or increase the performance. If it cou;d possibly be justified it would be widely accepted, because the oil companies have a real interest in selling all high dollar fuel they can. Study after study says, save the $$ & buy chrome, or bags or more tires. Lovin the bike by feedin it the best is understandable. Put that thing on a proper diet & use the savings to spoil her with pretty stuff to wear.
I can agree with most of the truth in what you are saying, and indeed it can be proven that there is more energy in some lower octane fuels. However in my experience there is less tendency to knock in the higher octane, since all Japanese MC engines come from the manufacturer with very lean tuning of the carb, I don't mind the extra few cents per tank to have smoother starting and smoother running. I know it doesn't go any faster nor do I look for that, I just like smoother running and more dependable cold starts.
BTW, I do not take offense at others opinions, In fact I can frequently learn from them. After all, this is my first 650 Savage/S-40 bike. Nearly all the riders on this page know more about this particular bike than me.
I do have 43 years of riding experience on 42 other motorcycles I have owned, and can base my opinions on that. Please note that I said opinions not mandates.
Phelonius