VI of GC??

[NewGuy]

Does anyone know the VI of GC? I would like to use it to plot some viscosity points at different temperatures and graph it vs. other synthetics and dinos. I contributed to the Z-Oil report and the VI might be in the data we received, but that is on my home computer and I won't have access to it for a week or more. I did a search for VI + GC without success.

Isn't it frustrating that Castrol gives on the minimum data on their product data sheets? All of the other oil companies give Viscosity Index and a lot more information. Thanks for the help.

 

[pscholte]

According to the tests done by bruce381 the VI of The Green is 175 and of the Gold is 166.

 

[Patman]

I had a VOA done of GC from Wearcheck Canada and they gave me a VI of 180. It was from an M03 batch.

 

[Paranoil]

The VI of Castrol SLX (Green) is 167 according to the Castrol UK website.

 

[pscholte]

Looks like we are all in the same ballpark.

 

[NewGuy]

Thanks for the info. I am going to use both 175 and 166 and plot some viscosity curves. I know....it is a sad thing to do with my rare spare time, but I am a scientist. I can't help it.

 

[bruce381]

As I remember the slope may not be linear over 100C and under 40C.
you can only count on values between 100 and 40.
Bruce

 

[TxGreaseMonkey]

Castrol considers this data "proprietary." They wouldn't even give me the Noack Volatility. Somebody needs to wake these people up. I wonder if BP knows how poorly they appear? It's a joke!