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Is this safe for use with Buna O-rings? Can this be used in place of Mobile 28?
Sarah L on Jan 7, 2019

Regarding the use with Buna O-rings, we are not certain. We always recommend using the lubricants recommended by your equipment manufacturer.

It is also not recommended for substitution with Mobilgrease 28. Mobil Beacon 325 has a lithium thickener and an ester synthetic base oil while Mobilgrease 28 has a clay-based thickener and a PAO synthetic base oil. Though these two greases have the same NLGI grade 1.5, they are are incompatible.