Steve, for 2/10ths OK, but for 5/1000ths I wouldn't get to down on myself. Don't start believing that noncompetitive drivel now! Keep your head up and I hope you find the extra hp, FWIW, I don't know what you use, but a friend drives a Lotus Elan and says dyno bears out that synthetic oil gives him plus 2%. He has the shop and the dyno so I believe him. Mike