What is lubricant compatibility?

Lubricant compatibility means that oils or greases are compatible with each other and with the materials used in the system. Incompatible mixtures alter properties: Greases become too hard or too soft, viscosity changes, additives are less effective, corrosion protection suffers, seals swell or become brittle. Therefore, only mix lubricants if compatibility has been confirmed. When changing lubricants, empty the system completely, flush it and refill it completely. Manufacturer approvals should also always be observed, and simple mixing and material tests should be carried out if necessary. Clear labelling, colour codes and separate tools prevent mix-ups.

This keeps lubrication conditions stable, prevents breakdowns and makes maintenance easier to plan. Compatibility protects quality, plant availability and budget alike. In practical terms, a media register with approvals, sampling routines and documentation, for example on base oils and thickeners, is helpful. This allows risks associated with product changes to be controlled.