Mixing incompatible greases can have dire consequences. They may react together and cause a separation of the base oil or oils from the thickeners of the two greases. When this happens, the base oil can no longer stay in place and you get a messy situation – oil oozing or running out of the area where it was applied.

Can you mix lithium greases?

Lithium and polyurea greases cannot be mixed. "They can cause each one to lose their oil and dry out," said Hamilton. The product loses the ability to lubricate.

Are all red greases compatible?

Question: Polyurea is in the wheel bearing grease and is compatible with marine bearing grease but not the Red grease. ... Red grease is compatible with marine grease but not standard.