I used to run Kendall oil until they got bought out. Went to VR-1 for a while, But alway notice after a lot of highway use the oil did not look right. Don't quote me on this as this was a while ago. I believe I read VR-1 not good for highway use and high heat. The oil brakes down. So I stopped using it. I was going to start using Rosella T 15w40 But they change the formula, So I started to use Brad Penn. I have not used enough to say much about it but so far good stuff.
Some oils do rob horse power but to most people that little bit does not matter.
