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I am an ardent fan, user of Marvel. Back in time when our motors were prevalent, every gas station offered products derived from petroleum. One of the biggest movers was a half pint can of 'Valve Top' oil. Folks would throw one in the tank when ever the motor started to run 'rough'. The valve needs that little bit of help to keep it from sticking.
While OHV motors have the the valve above the chamber, where all the heat is being made, they get ( most cases ) a good supply of oil. Also, I understand they run stiffer spring pressures.
I like Desoto291Hemi's policy. A pint shortly before draining the crankcase. On a New motor I always add a pint to the oil, then new oil and filter in several hundred miles.
( However one 'overseas' manufacturer claims that every motor in their new 100 thousand mile warranty car is run for a thousand miles, at the plant. )