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Read our primer articles on Oil Analysis and Tribology

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The generally accepted testing (basic) for grease compatability is to mix the 2 samples 25 - 75
50 - 50
75 - 25
and to conduct the ASTM D1831-94el Standard Test for Roll Stability of Lubricating Grease
and then to conduct the ASTM D217-97 Standard Test for Cone Penetration of Lubricating Grease.

Now comes the fun part. At what level or percentage of change are you as the end user going to accept/reject. And based on what performance criteria? The thinking is that if the 2 lubes are compatable then there will be a small change in the grease consistency. If there is a big change after the 2 hour test then you would assume that the 2 lubes are incompatable.

regards.....
You are right.The grease compatibility tests are done as per ASTM D 6185 in which Penetration, drop point and high temperature tests are done on 90:10,10:90,25:75,75:25 and 50:50 mixtures of greases.Depending upon the criticality of application Tribology tests are also recommended.
Normally,if the bases are same they should be compatable.
There is also a chart showing which grease is compatable with other grease.
Thanks
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