Best 0w20 for Extreme Cold Start at -20F?

Silly BITOG logic. Used cars all run differently and have no commonality. Justify it all you want but changing between different 0w20 oils is irrelevant in the real world.

Caring for your vehicle and being obsessed with minutia are different things.
Dude, you are on a dedicated lubricants forum, you are just as obsessed with the “minutia” as the rest of us!
 
HAHA! -20 would certainly be extreme cold to me, but you can always find someone from even colder places. -20 might seem tropical to an Alaskan that sees -50, and -50 would be balmy to a Siberian that experiences -80 every winter.
Below 50* F is extreme cold to me , that is why I run 0W-40 all year.
 
I'm too lazy to find it but Mobil had an article where they tested multiple "winter" motor oils in a single car at some extremely cold temperature. The goal was the highest RPM at cracking (ignition was off to prevent engine from starting). With some oils the engine would not turn over. The aim was to showcase the cold start abilities of one of their oils.

Ali
 
I don’t think I would want to live there
get back to me when you've spent a winter in Yakutsk Siberia...and no I haven't, but seen many documentaries on that place called coldest city on the planet...I mean right now nov 14th it's -27f...
All the longest surviving citizens in that city have the same exact name ...... Yeti.
They've all had their drivers licenses revoked too. Guilty of employing too many drunken Alaskan Malamutes and Siberian Huskies.

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Back when I was a kid in high school, everybody ran 10w-30 or even 10w-40 here in Minnesota even in the coldest winters. Yeah, I spent a lot of time trying to get the old carb'd engines with points ignition started, usually the batteries were half shot so there was little spark. I wish we would have had 0w anything to use!
 
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