M1 0W20 High Mil 40C visc

[Silver]

Anybody care to even guess what the secret number is?

https://www.mobil.com/English-US/Passenger-Vehicle-Lube/pds/NAXXMobil-1-High-Mileage-Oils

 

[Mad_Hatter]

Probably similar to M1 AFE & M1 EP 0w20.. somewhere around 45cSt.

 

[paoester]

40 cSt. Given VI & kv100, that determines kv40 exactly.
BTW, 9 cSt KV100 is on the high side for a 0w-20. HTHS a bit high too.

 

[Silver]

Originally Posted by paoester
40 cSt. Given VI & kv100, that determines kv40 exactly.
BTW, 9 cSt KV100 is on the high side for a 0w-20. HTHS a bit high too.


That would be the lowest 40 I know of at this grade. Can hths be too high as long as visc and flow is adequate?