Just a note here, Your right in what your saying,but a rich mix of 15% with 20+% Caster oil ( I add extra) at full throttle, wont hurt anything. I respect your insight,I just like to get my engines oiled up good first. Nothing like caster oil for lube oil,however, If you run lean for to long,caster will carmalize on your pistin,and you will have to replace it.and your cylinder liner.