GC..Does anyone know what the border line..

[Rick]

Pumping temp for the GC 0W-30 is?

 

[Patman]

quote:

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Originally posted by Rick:
Pumping temp for the GC 0W-30 is?

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Colder than you're likely to ever see in your neck of the woods.

It's probably somewhere around -60F or colder, since it's pour point is -81F.

 

[Rick]

So why does it say -40 on the back of the bottle?

 

[G-MAN]

quote:

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Originally posted by Rick:
So why does it say -40 on the back of the bottle?

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It says the oil provides for "unaided" starts down to -40. This means you don't need a block heater or sump heater with this oil at temps down to -40. For this oil to flow freely enough at -40 to provide for unaided starts, its pour point has to be lower than -60 F, which it is at -81 F. Borderline pumping is usually about 20 degrees above the pour point, so figure -60 F for this oil.

[ December 03, 2003, 10:30 PM: Message edited by: G-Man II ]