5W/30 in a 5.0L ?????

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Oct 16, 2024 | 01:45 PM

#21

Cee Jay

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From: Kaysville, Utah, US

Bah, just mix 5w and 0w about 50/50. There ya go, 2.5w-20. (not really since they don't actually average, just create a duality)

Oct 17, 2024 | 04:26 PM

#22

guy

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From: Ottawa, Ontario, Canada

Not sure this thinking is entirely accurate, @sony2000 .

Oct 17, 2024 | 07:46 PM

#23

jahummer

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From: Florida

Quote:

Originally Posted by sony2000

When choosing a synthetic oil to run in the winter months, the viscosity is relatively unimportant, because the oil doesn't thicken much in "very cold" weather. What worries me more are the manufacturers choosing a thinner viscosity, to achieve a better MPG. So I tend to run thicker oil, and the hell with MPG.

It’s not just about MPG, the engines truly do have tighter tolerances where cold
start lubrication’s critical. In colder climes and real winters, 0 is best suited. In warmer climes, 5 is best suited.

Oct 18, 2024 | 03:18 AM

#24

RichardS

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From: Evesham, Worcs, UK

Quote:

Originally Posted by guy

Not sure this thinking is entirely accurate, @sony2000 .

I agree. The W rating of the oil vs the ambient winter temperature is actually the most important consideration of all when considering motor oil viscosity.

Richard

Oct 18, 2024 | 05:29 AM

#25

sony2000

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From: Montreal, Canada

I was thinking that it goes without being said, that the tolerances in the engines of today are tighter. That's why we are down to 0W, 5W, and have left 10W30 and SAE 30. With global warming we are not getting the -40F or -40C nights anymore. And so, 0W is less required.