Penrite sells a "Semi Fluid Grease (self levelling); it is an extreme pressure (1500w), NLGI 00" grease
Penrite also sells "STEERING BOX LUBE:
Suitable for veteran/vintage and some classic car steering boxes, this high viscosity (1200w) self-levelling grease . . . "
John Deere Corn Head grease is NLGI grade 0.
That is close enough.
