Rebuilt 1962 F 134. Complete rebuild to factory specs. This engine has a two piece split rear main oil seal. Took great care in installing the seal as if it leaks this is a very time consuming repair. You have to take the entire power train apart and half the motor. With all my care after startup I had a couple drops of oil. Has anybody ever used rear main seal leak stop added to the oil? I know this is a poor way to fix but IF it works a good 20 plus hours labor will be saved. Any opinions abut this?