This is one of my favorite styles of writing. I have absolutely no clue what this person is talking about and have no interest in cars, yet I read every single word. I love when people have such a deep knowledge of something that they can write an essay as unique and thoughtful as this. It reminds me of Kitchen Confidential, Surely You're Joking Mr Feynman!, or any rant about British politics by David Mitchell.
It's quite fun, but anyone can pick it up in a few days if you join a few great Car forums that remain, or, ick, facebook groups and reddit groups. The discord groups are more of casual conversation and making fun of each other/new people who are trying to DIY. The BMW car forum is good, bimmerforums.com. Pelicanpart forum is good. BMW/Porsche GrassrootMotorsports is good. General racing, falls back to bmw/porsche/co…
Mixing DOT-5 brake fluid with DOT-3/4 is always a fun one. Folklore is that it will poison children and kill puppies. Reality is that they are, by law, compatible and mixing won't do anything more than create a fluid with unknown boiling points, but this is true of mixing any two brake fluids (and it is true DOT-5 is not compatible with ABS brake systems, but that's a separate point).
Pretty much anything to do with turbos is another fun one, as many folks have no idea how turbos work but have lots of opinions on tuning them.
Anyway, the point is that the comradery is great on these forums, they're a lot of fun, and you can find good info, but don't take any info on them as gospel.