Which type of oil to use

fishmens67 said
and I'd say your tolerances are on the tight side.

Or, his clearances are correct.

This is why brother Newbomb is constantly harping on guys to tighten up their clearances to 21st century standards.

My climate is sub zero to 100F plus. I used 5w30 and it was a bit on the thick side. This time I'm using 0w20.

Even off the shelf oils are so much better today that there is no real reason to run a 50 grade oil.

And why these companies still produce single grade oils baffles me.