Tex-

Lean or rich what happens thousands of times per minute inside our little engines....
A little fire ball explodes inside them! A fireball that is burning nitromethane! Nitro methane burns at over 800 degrees!
So why is it so hard to believe that a rich running engine cant have scorched oil on the pistion head??? Its only castor oil and im sure it breaks down at less than 800 degress..

Im just sayin that a rich engine can have depoists... Not trying to fight with you bro.. Just trying to have a conversation so please dont take this as me tryin to be a jerk