Using synthetic lube in these old rigs is beyond foolish. They were manufactured with recycled dinosaurs as the specified lubricant, and using glorified vegetable oil is an exercise in financial and mechanical folly. The boxes will spring leaks in places you never knew existed, so buying that drum of lube might not be a bad idea if you're really determined to use the stuff.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!