Question 1

How do I choose between water-soluble and water-insoluble PAG grades?

Accepted Answer

Water-soluble PAGs offer excellent heat transfer and are easily washed away with water. Water-insoluble PAGs are preferred for gearboxes, air compressors, and applications where water contamination must be shed rather than dissolved in the lubricant.

Question 2

What does the ISO VG number mean on a PAG grade?

Accepted Answer

The ISO VG indicates the lubricant's nominal kinematic viscosity in centistokes (cSt) at 40°C. For example, an ISO VG 150 PAG grade has a mid-point kinematic viscosity of 150 cSt at 40°C, within a ten percent tolerance.

Question 3

Can a PAG grade selector help replace mineral oils in gearboxes?

Accepted Answer

Yes, our PAG grade selector analyses your application to recommend the appropriate synthetic PAG equivalent for your gearbox. Transitioning to a PAG grade often allows you to maintain the same ISO VG while benefiting from lower friction, higher thermal stability, and extended oil drain intervals.

Interactive PAG Grade Selector for Lubricants

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