Normal
I myself like NoToil air filter products. I have never had any trouble with dirt getting by. The only trouble I have is, I had a filter tear when removing it from the base. I like Spectrol SX 32:1 synthec. Even though I mix it 46:1. CR500. I have tried Maxima Formula K2 with good results. I just think the Spectrol SX 32:1 was cleaner and less smoke. I run just about anything synthetic 75 or heavier weight in my case. Cuz I change it every other 2 rides. So I never have any issues with case oil.