Originally Posted By: Shannow
But thinner reduces the minimum oil film thickness which isn't a good thing if load/temperature dictates.
see the advice re Ford/Chev re track use, and various other manufacturers regarding temperature and load/speed.
But for the average engine in a sedan that calls for 20Wt(perhaps millions of them)your scenario isn't relevant. In big hard use V8s then yes, I would agree with you. My son has a big block GM engine in his 2017 GMC Yukon(not hard use) that calls for 0-20. He now has 35K on the vehicle and all is well. Also if I had an engine calling for a 30Wt I would use 30. Same with 40wt. Life's simple that way.
But thinner reduces the minimum oil film thickness which isn't a good thing if load/temperature dictates.
see the advice re Ford/Chev re track use, and various other manufacturers regarding temperature and load/speed.
But for the average engine in a sedan that calls for 20Wt(perhaps millions of them)your scenario isn't relevant. In big hard use V8s then yes, I would agree with you. My son has a big block GM engine in his 2017 GMC Yukon(not hard use) that calls for 0-20. He now has 35K on the vehicle and all is well. Also if I had an engine calling for a 30Wt I would use 30. Same with 40wt. Life's simple that way.
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