Originally Posted By: artificialist
A quality u-joint isn't sensitive to what grease you use, so long as you don't mix greases improperly.
Get your grease gun out and use whatever lithium base grease is inside your gun.
I use Valvoline Durablend because it meets Ford specs, and it meets specs...
One key thing to remember , the oils spec'ed for 2 cycle Detroits will be a CF-2 while many will say it's obsolete in API specs this is simply not true if your using it in the Detroit 53 , 71 ,92 , 110 series engines.