Application: add 50 ml ( 0.01 gal ) of mos2 antifriction engine treatment per liter ( 0.26 gal ) of?

Do not add anything to oil unless the manufacturer tells you to, which will NEVER happen. If an oil additive were any good, the oil company would add it and advertise it. They don't because additives can cause major damage. Teflon can collect in small passages and block the oil. Moly can absorb water and cause corrosion. The engine was designed to use pure oil and that is the only thing you should ever put in it.