This request comes up periodically; you could search old threads for the long and very passionate responses :-)

I like Superlube, which is a synthetic grease that is very temperature stable over the range that we tend to fly sailplanes. Great for main pins and other fittings. There's also a spray lube from the same manufacturer for those drives and other fittings that call for it.

Quick check on Amazon DE shows it's available there.

P3