one thing I've noticed watching a ton of "does it run after sitting for 20 years" videos on youtube. MMO is the go to product for unsticking rings with these guys
Yeah, I can see why they would use it. An old guy that worked with me at the automotive machine shop rebuilt those old Kohler flathead V4 motors that used to be used on everything. He would start them up and let them run after he rebuilt them. He always added Marvel Mystery Oil to the first tank of gas in a freshly rebuilt motor.
That's the first time I had heard about it.
