My local audio dealer recommended sewing machine oil which I used on my Beogram 4002. Seemed to work well, but now after all this talk about silicon grease I wonder if I have made the wrong choice.
Sewing machine oil is just fine for the smaller targets, like pivots, axles, etc. It is however so thin that it won't stay very long in places where capillary effect doesn't keep it sucked in. For bigger stuff, like slide rails, I've used white lithium grease which you can get in any auto parts store (in tubes, not the spray can stuff).
When/if hunting for silicone grease, never confuse it with SILICON paste, which is used between components and heat sinks. That will be first sticky and then hard in no time at all!
Incidentally, the shop manuals often list the "correct" lubricants, but I don't suppose anyone wants to start playing with "Rocol MTS 1000, diluted to oily viscosity with ESSO NUTO H 44" 😎 (but the lubricant listed for many parts in BG4002-6000, "Castrol everyman oil", is quite accessible...)
-mika