[Dragncar]

Originally Posted by Schurkey

He says that 50-weight pegs his gauge when driving, and even 40-weight shows 75 pounds on the gauge when driving.

He doesn't need that kind of stress on the distributor drive or driven gears, or the oil pump. And he MAY need more flow through the bearings to carry away heat, which the thick oil is poor at doing.

There's just zero need to run oil that thick, and several reasons not to.

You saying there is "zero" reason to run oil that thick is utter nonsense.
I ran 20-50 for 3 decades in my old 455 and I beat the snot out of it. Never hurt it, never spun a bearing in my life.
That engine had 78lbs when cold and the BOP gear was in such nice shape its in my new 461.
This engine has 80lbs cold and 45lbs at a hot fast idle. 65lbs going down the track.
It has .006 piston to wall because of block fill so the 5-50 weight high end oil is a good idea.
This 5-50 oil is not really all that thick, its fantastic stuff.

[PAUL K]

Originally Posted by Dragncar

This 5-50 oil is not really all that thick, its fantastic stuff.

Try pouring any motor oil when it's zero degrees and when it's 200° and one will learn about advertised viscosities really fast.... But it makes for an entertaining Internet discussion.