As far as LiquiMoly MoS2, I was a user awhile back and had issues I did not even know at the time I had. I guess my equipment at work was my "Canary in a cave", for possibly saving my engines at home that were all getting LM MoS2. Additives beware I guess. This is a copy I posted before from my interaction with an industrial oil R&D chemist from Summit Industrial Oils (Kluber company).
I used to use LM MoS2 in my car/snowblowers/lawnmover at half doses and I used it at work at LM recommend dose in our CAT pumps that run our humidification system. One pump is run at 1725 rpm and another is on an A/C motor drive for variable rpm as that feeds multi room small sprayers. The latter was the problem pump as it had some low rpm and I wanted the moly to aid in wear at those lower rpm levels it would hit. I used LM moly in both pumps. The moly only helped a little bit in the "sometimes" low rpm pump.
I use Summit Industrial Oils in Texas (Kluber company) for our group 5 oil in our rotary screw air compressor oil and in our CAT pumps. With Summit, you have 100% access to anyone in their company. I have talked couple times to the president. For my wear issue, I was pushed right to their lead R&D chemist. I told him what oil I was using at the time and that I use LM moly at the correct recommend value per oil oz amount used. First thing out of his mouth was " I bet you are having seal leaks" I said how did you know that, thinking it was the oil he was talking about. He said it's not the oil, it is the class of moly you are using, it is horribly hard on seals. Once a year I would have to put in a new main seal. I even went as far as to get another top named seal thinking CAT's seals were cheap. Still the same leak on both pumps TWICE. I excepted this as a CAT issue and not what I was putting in my oil.
I dumped my LM oil that day and put in new oil and 1 week later I received their recommended oil for my issue and in the last 5 years I have not had a single seal leak. I went from 300 hr dumps and seal leaks to 500hr dump times with zero oil leaks. Needless to say I won't put additives in my oil anymore other then AT-205 re-seal at half the recommended every 2 years.
Not saying not to use LM moly, (I use it at work for sliding oil additive on a paper drill slider Gibbs) just stating my issue with LM moly and an R&D industrial oil chemist's opinion. 5 years later he suggestion was right in my case.