I've been using the Yamalube 2R oil for my tri-z lately, but when I put it back together I might use something else. My choices are the Klotz Benol which is a castor oil. I'm also looking at PJ1 Goldfire Pro which is a petroleum/synthetic blend. What are the good or bad points of each one? Any likes or dislikes? Advantage of either castor or the sythetic blend? A long time racer told me one time how the blended oils is the best of both worlds and reccomended it ove regular oil and synthetic oil for use in cars. Anyways, lets hear your thoughts