I have it in my truck, and it works great. It is very thick and helps stick to the loose engine parts that clatter on high mileage engines. I have valve clatter on my 160,000 mile truck and running this stuff took almost all if no it all out.
I also ran some in my truck, a 76 gmc and thoght it did a good job. As for my bikes, I ran with 20% but have no long term results so I was hesitant to put some in my new bike before doing any research. In my kdx, I didn't get any cluch slip or anything.
There was a great thread that defined all oils for bikes and cars, it would surprise you. Search it out it was a thread I started about three weeks ago, called OIL CHANGE.