Interesting oils illustration

[Biggles]

https://www.facebook.com/reel/1104038810646382

[Williamson]

https://www.facebook.com/reel/1104038810646382

Yes, but what does it mean?

[Biggles]

https://www.facebook.com/reel/1104038810646382

Yes, but what does it mean?

Well it clearly demonstrates the fact that oils for low temps are "runnier" and so lube the engine quicker when cold, and engines using high temp oils in hotter climates need oils that won't turn to junk when they're heated to higher temps- they keep on sticking the lube where it's needed.
It's just a visual demo of what we already know...

[Brock]

Thats why I dont use super low viscosity oils im my engines. 0/20 in thge West Oz summers would be worse than water.

[CallMeSteve]

Interesting.  I always thought that the thermostat would keep the engine temperature fairly constant regardless of the ambient temperature. I’m having trouble understanding why one would need to change the oil viscosity according to climate. 

[Brock]

Mainly cold engine protection. You need a really thin oil in subzero conditions, so it can flow when cold. you need a heavier oil when hot .