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Because of the elliptical orbit of the connecting rod, the bearings self pump better than main bearings. What are the rod and main bearing clearances in the 6.2L? I’m blaming the low viscosity 0w20 being insufficient for the journal diameters, bearing clearances, rpm and low oil pressure...

That’s debating.

What did your mother used to say? If you’re not part of the cure, you’re part of the problem. That obviously goes for 0w20 in the 6.2.

You can test your theory by ditching the 5w30 and running 0w20. If the engine doesn’t squeak to a stop, move down in viscosity to 0w16 then 0w8. Are UOAs a reliable indicator of engine wear?

So once your 3.6L is out of warranty you’re going to put 0w16 (or 0w20?) in it? Next question; Why would you? Lake’s video should hit a million views today. And he is not the only content provider on the topic. This should explain the run on 0w40 engine oil. Anyone who watched any of the videos...

Put 0w20, or better yet 0w16 instead of 5w30 in your 3.6L if you believe that. During testing for GM, LSJr stated that they had to reduce engine oil viscosity to increase bearing wear. Thin around and find out.

Got it. JD X320 PH8A, Kubota 2290 #3600. Both have the 726 Kawasaki engine. The big OD PH8A won’t fit the Kubota because there’s a low oil pressure kill switch in the way.

Only if your name is Popeye.

Is 5w30 good down to minus 50F?

Sorry, 50 below. A Randy Bachman and Neil Young song from the 70s.

Portage and Main 35 below.

Husqvarna Scania 6.5x55 Man (trucks n’ busses)

Saab ABBA Visconsin

Maybe not.

What does a top cylinder lube do?

Viscosity loss from shearing is cancelled out by evaporation of the light ends. -Noack

Delvac.

In your case you don’t need a synthetic. Walmart 10w40 ST is good enough for an experiment and the price is right.

Google Red Line.

Google 0W20 engine oil.