we used Mobil 1 grease at work for a while, well to make a long story short and a few bearings, we went with Schaeffers #274 and all was well. and some Mystik jt-6 semi-synthetic (blue color), which is a impressive grease.
m1 is the leaky-est grease I've ever used.. I have a grease gun with green grease in it in my hot shed and no leaks even with plunger not pulled back..
doing everything right the m1 leaks out while stored in my 60f basement.
I dont care how good it is.. I'm not signing up for that.