Thanks for the mentions
Velo Mule and
nlerner 
My Four Cents of advice after servicing 1000s of freewheels:
1st cent) Synthetic grease in the bearing races (I prefer Super Lube). It is very temperature tolerant, plus water and salt resistant.
2nd cent) A few drops of high-quality machine oil on the pawl pivots, pawls, and wiped across the ratchet teeth.
3rd cent) Blue Loctite on the outer bearing race/retaining ring (hand tighten only)
4th cent) The Phil Oil/TriFlo/WD40/Soak-in-Solvent, flush and dribble method is only a stopgap, short-term freewheel service method. Oil will not remain in the races. It leaks out and coats the sprockets, allowing dirt and grit to stick, thus leading to premature wear of the sprockets.
Finally, my advice is to never use the grease injector tool which floods the interior with grease. A freewheel is a mechanical device and not a bearing.