Wanted to hear from WR owners about this product. Let me hear your thoughts on it if you have used one on past YZF models, how it worked for you, any problems encountered. It is quite expensive at $70. If it lasts like they say it does, cleans easy and filters down to 35 microns, sounds almost too good to be true. I'm planning to keep this new bike a long time. I use synthetic motor oils in my road bikes and my WRX with good success. I just wanted to know about using them in this motor. Is it recommended or discouraged?