Can I mix Krytox grease with other greases?
The performance benefits of Krytox grease will not be realized if Krytox™ is mixed with a non-perfluoropolyether (non-PFPE) grease. The performance of the grease mixture will be limited by the properties of the non-PFPE grease in the mixture. Krytox grease will not react with the other grease or cause decomposition or any hazardous reactions. The mixing tests initally performed by DuPont have shown that the mixture sometimes softens up by about one penetration grade when it is heated up. This normally will not be enough change to cause any significant problems.
The Krytox grease will not stop the other lubricant from breaking down from heat and oxidation. It is likely that the additives in the hydrocarbon grease have coated the bearing surfaces and the Krytox grease will not be able to adhere to the bearing, so most of it might get thrown out of the bearing.