I work in utilities (water and sewer) and both my well and sewage pump motors require a certain type and amount of grease through the provided Zerk fittings. In the process of removing grime and other 50 y/o gunk from my front end, I have been wondering what kind of grease these Zerks take. After so many nights of scrubbing, scraping, and drinking (until I see double) I simply forget to ask. Do they take the same type of grease that we use on our motors (which I have an unlimited supply of) or do they take another type of grease? I find it hard to believe that my water pump takes the same type of grease as my 175HP well pump motor. But, in the words of Mitch Hedberg: "Who knows?"