I like the Opti2 in my MB's and 2 smoker lawn equipment, never had anything but great results in every way, but at the same time I'm not so sure I would ever use it in an extrememly high performance machine like an old Yamaha RD350 ect., I would probably go with an Amsoil product for that, or just another proven high grade conventional oil, my late uncle who owned a Yamaha Dealership, built and raced 2 stroke & 4 stroke motorcycles ran nothing but Castrol Products and would run nothing else, he seen first place many many times and swore by the protection and performance of anything Castrol made.
I like Opti2 in my MB's because it has proven to work great for me, and because it provide a mix with minimal smoke and smell, same for my weed wackers and chain saws, they all run great on it.
If it works good and someone is happy with it, thats all that matters me I like lots of the stuff I've tried.
Peace, Map