I get made fun of by the guys I run with, but at the end of the day, I believe what grease you use in what joint DOES make a difference. As far as bearings go, I don't care if you run lithium, aluminum, calcium, or polyurea, just don't mix them. Same goes for pins/bushings, except make sure it has moly. The heavier the load, the more moly. I won't use polyurea or aluminum complex because they seem to not play nice with anything but themselves. Lithium and calcium work fine together, the calcium sulphonate 5% moly grease I use doesn't pump worth a dam when it gets cold, so I switch to a lithium complex 3% moly that has a synthetic base oil that pumps great down to about 0°. They work fine together.