Well, I posted this up because it may be of interest or help to someone's knowledge base. If Dino is what we're used to, and if synthetic is better, you'll have to decide if semi is in-between. Would seem so to me. My 5th Gen manual says oil that meets API SE, SF or SG, nothing about motorcycle specific..... and all of those Dino's are obsolete. Whatever you use in your bike is up to you.