I go back to what Mad Monk (Bill Knight) told me, "Make sure whatever you use for lube can be removed with your cleaner of choice."
I learned that neither water nor windshield washer fluid cut graphite, which is a byproduct of all of our black powder these days.
Mr. Flintlock lube will remove graphite, learned from Bill. The original LVL did too, and Mr. Flintlock is very similar. I use Mr Flintlock as my final cleaning each session.
Mr. Flintlock and Hoppes Blackpowder Lube and Cleaner both are great lubes, the latter being REALLY slippery. I wouldn't trade either for neetsfoot oil.
I have never had a mind that says, "Hey, I wonder if I can use this for lube?" I am an engineer, and learned from an engineer and professor, so I stick with the known. I only change if something is proven better in my testing, and change one thing at a time. I really enjoyed Mad Monk as he had a super inquisitive mind and vast experience with testing. I learned a lot from him.
You may have a lube you like. For the sake of newcomers, I like to point out known and available products like Mr. Flintlock and Hoppes Black Powder Lube and Cleaner for wet lubing. The Track 100% mink oil is a good lube for hunting and when the gun may stay loaded a while. I also like to point out the The Minute-Men plain 100% canvas patching material is a no-lose proposition for a tough and reliable patching.
I hope this helps someone. God Bless, Marc