Shaffer 50wt, full syn. the pick up tube fell off the oil pump (sand bar bash) and it ran till it locked up the oil pump and twisted the dizzy shaft off and shut down, No damage to ANY parts other than the oil pump! could have replaced the pump and went back to work!
Also, using the same oil, I ran a SB Chevy with NO coolant (water pump went out) for every inch of 4 miles, ON THE FLOOR and It would NOT quit! the engine was so hot it broke the skirts off all the pistons and boiled the gas out of the carb, cranked right up the next day! Unbelievable! That was officially the end of that engine but the oil did it's damn job! I stand by Shaffer oil!
YB 468 was riding with me, ask him!