For example, lithium grease can be applied both in chassis and wheel bearing applications of transport vehicles. Traditionally, calcium greases were used for chassis, and sodium-based greases were utilized for wheel bearings. Calcium-based greases have been rated high for water resistance but poor for elevated temperatures.
Grease Compatibility Chart Mixing greases in a system can cause issues with thickener systems reacting with each other. This can change the physical and chemical structure of the grease, causing an inability to hold or release the base oil.
Polyurea greases generally have high dropping points. The other characteristic is that they leave much less dried sediment/leftover soap as the grease gets used up and replenished over time. that's why polyurea is popular as an elec. motor grease.