To understand how greases work you must first understand what components make up a grease. The three primary components of grease are:

OIL 80-95%

THICKENER 5-20%

ADDITIVES 0-10%

With oil being the largest component in a grease, the viscosity and type of oil is very important. Just as you pick an oil for an application you should also understand the oil component for a grease application because it is the oil that provides the lubrication needed in an application.