Taken from Amsoil's product listing on the GHD
"AMSOIL Heavy Duty EP Grease is formulated with a top performing lithium complex thickener system that provides excellent water resistance as identified by the ASTM D-1264 water washout test. AMSOIL Heavy Duty EP Grease adheres to metal and is shear stable during severe mechanical activity, maintaining consistency and providing superior lubrication protection.
The correct consistency grade of AMSOIL Heavy Duty EP Grease is recommended for use in heavy and light duty applications found in manufacturing plants, automotive applications, agricultural equipment and construction equipment. These include, but are not limited to, roller bearings, plain bearings, gears, bushings, wheel bearings, chassis lubrication, universal joints, ball joints, tie-rod ends, steering knuckles, and heavily loaded pivot pins on mining and off road equipment such as power shovels, draglines, wheel and back hoe loaders, excavators and bulldozers. AMSOIL Heavy Duty EP Greases are suitable for use up to 325º F. When operating at elevated temperatures, frequent regreasing may be required."
Should be fine for u-joints. I use their GLC multi purpose grease.
