I've been a sponsor on BITOG (Bob Is the Oil Guy) since 2001. I have a degree in chemistry and have been in the industry since 1982. I am NOT an old guy
but I know a thing or two about lubricants. I found the article lightly written and easy to read. Knowing the constituents of ATF, I don't find it to be a great firearm lube nor oxidation preventative. It's basically in the same league as motor oil, only on the lighter side, with less AW additives, and yes some different additives. That said, there are some small engine oils with plenty of storage type oxidation preventative (vs in use heat stabilization type anti-oxidation additives), which may be useful with firearms IF you want to use motor oil on your guns. Frankly I DON'T like or use motor oils on my guns.
Indeed, use what you like and works for you. I do tend to change around a lot, so frankly I can't claim I've done some long term study with one lube in one application.
I don't use grease much but when I do, I use Amsoil synthetic spray grease - but Amsoil discontinued that product and came out with a replacement (I have not tried it yet because I have a case of the older stuff). I've tried heavier greases and most all #2 grease are WAY too heavy for firearm use, especially if cold and too much is used. I do use this light synthetic oil based grease on my semi-auto slides, but I use such a light amount it's barely visible. I do go a little heavier (slightly) when breaking in stainless-on-stainless only because I'm overly worried about galling (pure paranoia) but I've never had a problem.
For light oil I use Amsoil MP, and for medium oil I use corrosion-X. The only guns I purposely over oil a little bit are the AR's. I just think they are made to run a bit wet and I'm not dragging them through the sand. It makes clean up so easy.
For cleaning I recommend a 50/50 mix of Hoppe's 9 and Kroil.