M1 15w50 in the cold impressive

[Bill in Utah]

So 10f and 7f is cold these days?

 

[ToyotaNSaturn]

Originally Posted By: OVERK1LL


MRV of M1 5w40 is 25,400 cST at -35C.
MRV of M1 0w40 is 26,242 cST at -40C.

It obviously has superior cold performance.

I cannot find an MRV data on the 15w50, so we'll have to suffice with these values and the Widman calc ones:

M1 0w40:
cST at 40C: 78.3
cST at 100C: 14
Density at 15C: 0.85

M1 5w40:
cST at 40C: 100.4
cST at 100C: 14.9
Density at 15C: 0.85

M1 15w50:
cST at 40C: 131.2
cST at 100C: 18.1
Density at 15C: 0.87

Widman's calc data:

Code:


GRADE -35C -30C -25C -20C

0w40 11308.5 6706.5 4135.4 2641.8

5w40 32292.6 17380.1 9818.5 5795.1

15w50 49794.3 26423.4 14724.5 8576.4


I know Doug does not put a lot of stock in the validity of the numbers below 0C, but it does give us some points of reference.

I have PERSONALLY experienced the difference between the 5w40 and the 0w40 in my own vehicle this winter. And to say it was substantial would be putting it mildly.


Excellent data, thank you!

 

[dime]

great data,just grabbed two 5qt containers of the M1 15-50 on clearance at walmart. planning on using it in the bike this summer.....the sites getting too me,already horrding oil lol

 

[ToyotaNSaturn]

DELETED, post moved elsewhere.

 

[Nederlander75]

We have had a couple weeks with below 0 temps, but low teens and signle digits are a bit colder than normal. My post was more of being surprised and impressed with the observed cold start of the M1 15w50 since Ive always had a low viscocity preference.

 

[CourierDriver]

mobile one is good to -57 degrees F, as u all know the first number is the low value it sees on start up, so 15w50 will do fine

 

[chevrofreak]

Originally Posted By: CourierDriver
mobile one is good to -57 degrees F, as u all know the first number is the low value it sees on start up, so 15w50 will do fine


Care to elaborate on what "the first number is the low value it sees on start up" means?