I agree about the oil..prolly doesnt make much difference in the end..I just like to tinker..I flew today with the H1R..I started out at 6940 rpms and after tweaking the needles a bit ended up at 7020...Still had a slight burble at 1/4 throttle but I figured Ill deal with that next time I fly..I did notice a bit more oil on the plane than with the 80:1 Amsoil but it wasnt enough to be worried about. Funny thing is I ended up with almost identical needle settings with the H1R as I had with the 80:1 Amsoil