Cold temp viscosity

[blsnelling]

This post is related to the start-up knock in my '01 Sierra 5.3. Which of the following oils would be the most pumpable at low temps? I've not yet schooled myself in reading the product data sheets. Not sure what I'm looking at.

1. Mobil 1 Extended Performance 5w30
2. GC 0w-30
3. Amsoil 5w30
4. Amsoil S3K 0w-30

 

[AndyH]

What is your definition of "low" temperature?

 

[bob_ninja]

Look at CCS and MRV, lower values are better.

 

[blsnelling]

Well, it's a balmy 8F outside right now. Really, anything under 30F.

 

[TR3-2001SE]

I can judge two of these oils. GC is not going to be best for cold starts. Mobil 1 Extended Performance 5w30 has great starting spec. in cold weather. However Amsoil is a great oil and may have better.

 

[blsnelling]

Does anyone have cold temp viscosities for these oils?

 

[mitchcoyote]

Amsoil is slightly better than Mobil 1 .....