Back when I tolerated 35 F as a "flyable day" -I flew my gassers on 100% synthetic oil - which I also used from day one on all of em -
All of em broke in with no scratching - excellent compression - easy "flippity flip" when cranking over when starting
I always choked to get a "wet" sound before closing throttle to idle - Then a easy flip typically had em ticking over
An engine was never spun over in a dry state.
Never
Never