"Correct" grease? So far I've only dealt with one glider that is specific about what to use. The manual for my club's L-33 has a spec that crosses over to a MIL-G number that is equal to Aeroshell Grease No.6.

My ASW-15 manual just says "use a non cold coagulating grease." I've been using Aeroshell Grease No.22. They work well but 22 and 6 are a lot harder to clean up if you get them on your clothes than ordinary white lithium!