Quote:
Originally Posted by Capt Spaulding
To be sure, viscosity classifications refer to ranges so there are thin 0Ws and thicker 0Ws. Out of curiosity, do you have any empirical data to support this statement?
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Just going to stick to the same example as I used earlier with AMSOIL. Though this applies to pretty much all other brands that I have looked into.
https://amsoilcontent.com/ams/lit/da...tins/g2880.pdf
Kinematic viscosity @ 40C is rated at 47.1cSt for 0W-20 and 84.6cSt for 0W-40. Granted this is a fairly toasty temperature to be considered a startup temperature, but there is no magic that occurs in the lower temperatures that changes the viscosity drastically in the other favor. And again, to be clear, by lower temperatures I am referring to near freezing. Somewhere far below that is another topic and not one I am fully knowledgeable on, though I have read some interesting research on it in the past.