What is 20W-20???

[novadude]

I saw a case of Pennzoil 20W-20 at a "farm n' fleet" type store last night. I believe it was SH rated. What the hell is 20W-20???

 

[MolaKule]

Isn't that a Network news show? Seriously, it is an oil that cranks like an SAE 20 when cold and stays at an SAE 20 weight when hot.

 

[G-MAN]

It's a straight 20 wt that meets both the low temp and high temp requirements of a 20 wt oil. In the "old days" the difference between a 20 wt and a 20w20 was the 20w20 had a pour point depressant.

 

[rob-the-oil-nut]

We have some straight 20 that is in metal cans and is a bare minimum 15 years sitting there. Maybe 20. Maybe I'll donate it to a lab and post the results so we can discuss what effect shelf life has on deterioration.

 

[Patman]

quote:

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Originally posted by rob-the-oil-nut: We have some straight 20 that is in metal cans and is a bare minimum 15 years sitting there. Maybe 20. Maybe I'll donate it to a lab and post the results so we can discuss what effect shelf life has on deterioration.

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Now that would be a cool experiment!