[Chevelle-list] Synthetic Lube?

[Bob Haggard]

I have a new 12-bolt from Moser Engineering that I installed last month and the paperwork that came with it states in CAPITAL PRINT not to use synthetic lube.  I believe that EATON says the same thing about their posi unit.  I called to tell them I have a pinion seal leaking and asked about synthetic and was told that I can change it later on after breakin but the sales rep didn't know how long I should wait, any opinions????
Bob Haggard