Hmm.. the tubes I bought from the Canadian Supplier are red pink and white, and carded and use part #S2129. They contain the brownish lube. It was brand new stock, they had to order it for me in November.
Intererstingly, looking at Jenny's site, she's clearing the tube that Kathleen shows above, and say "This product can be used on metal gears. New formulation no longer reccomended for use in motor grease pots/tubes where there is a wick. Use petroleum jelly instead."
I guess this is as good a time as any to mention that I spoke with an electrical engineer a few months ago about these motors. I mentioned the brass impregnated bearings that Joe told me about, and the "problem" of finding Singer Lube. Apparently, according to my supplier, I'm the only person in Alberta who orders it from them anymore.
I mentioned that we use tri-flow oil and grease for the machines, but never the motors, because of the PTFE (Teflon) and there was a concern about what the PTFE would do to the bearings. He told me it would be better than the original grease. The brass is porous so that it would give the grease something to hold to, that's all. He said the teflon would further reduce friction, and that's what we want. I haven't had a chance to try it yet, but since the Singer lube has changed formula in some places, perhaps it's time to try.