More Rekluse oil questions. Today I was looking for Rotella T on your advice. Thanks. I noticed that the 10W-30 and the 5w-40 are NOT Ci-Plus rated, but the 15W-40 is. Can I run the 10W 30 in my YZ 450 or should I stay with the 15W-40? As I am sure you can tell I really dont know much about oils and engines and such. So if you could explain to me why or why not I would sure appreciate it. Thanks alot for all of your time on this. BnB.