Here's a look at some John Deere Cornhead grease I bought around 8 or 10 years ago. About 3/4 of a tube has been sitting in my garage since then. No self-leveling going on at all...in fact it is what in the oil world is called thixotropic. Just fyi. Hope it is helpful.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end