When I was in the North-South Skirmish Association, we made our own bullet lube from a bee's wax and tallow mix. Some of the guys also made candles from this same mix, more tallow = softer, more pliable, more wax = stiffer, less messy. I can remember a time or two that this concoction was used to grease a frying pan or dutch oven, and the food came out quite tasty, but I don't know if I'd try to live off of it alone for too long. The tallow would definitely be a good fat source, and the bee's wax is non-toxic, but without something else (wild greens and/or a tree rat or two) for a source of vitamins/minerals, I don't think you would put off starvation very long.
Any M.D.s out there care to give us a professional's point of view?
Troy