http://www.royalpurpleconsumer.com/products/royal-purple-synthetic-gun-oil/
I had not heard of this, but after reading your comment and several reviews, I want to try it.
I normally use RIG as my grease of choice, and LSA for oil. LSA stays around way longer than CLP (which will evaporate just from sitting a week or 2). As far as why the military switched, yes I believe they wanted an all-purpose product that would only require troops to carry one liquid in their cleaning gear. It's also harder to mess up. They can't really use too much unless they fill up the bore, because it's so thin. I'm sure some lobbying had something to do with the selection as well. (Doesn't it always?)
LSA was basically the perfect military small arms oil. It's just thick enough to remain where you want it, but still thin enough to float away contaminants in weapons with little clearance for debris. There are other military oils for arctic use (which are still issued) but it was the go-to general purpose choice for decades. I also get mine from the old tin quart OD cans. Mine have German markings with a NSN. I think I got them from Copes Distributing. Honestly I don't remember, since they've still lasted from 6 years ago. Lol I got some Mobil 1 after reading all the research here, but I always use the LSA on my duty weapons, just because I know it's so awesome. I've used it on full-autos countless times. The RIG too, where grease is needed. Same for Lubriplate, but I like RIG better.
I use Hoppe's 9 for a bore solvent. At work in the gunsmith shop, we mostly used Shooter's Choice, but many incoming guns were long-neglected and had non-chromed bores. The heavy ammonia content reduced the total scrubbing time required.