What the best silicone oil for a nomad Compressor?

[headsuwin]

I am never sure which silicone the world to buy for my nomad compressor. Was wondering what everyone here uses.

 

[DesertSilver]

Silicone oil is NOT a good lubricant. I use mobile 1 synthetic 10-40 in mine.

 

[headsuwin]

Thanks for the suggestion!