But there are all sorts of little secrets to these cars beyond a review. NABDOG (North American BMW Diesel Owners Group, on Facebook) has 3 independent mechanics between Michigan, Colorado, and Georgia that make a living just servicing members cars. We have guys 3D printing aftermarket air intakes and coolant plugs, and another guy who had connector caps injection molded. We have a big FAQ with all the information on what sort of oil TBNs and detergents are good for the engine. We have a list of common failures, like the fact that on the E70 the plastic rain trays at the bottom of the windshield have a poor design and will drip water down directly onto injector six if they crack, rusting it onto the head and potentially ruining the engine, or a tutorial on how to clean the sunroof drains. e90post/etc has some of this, but it’s not as good. NABDOG has a personality with its own memes and such, it genuinely feels like a community relative to a forum.

Probably the most useful part of NABDOG is that I can think of a question while I’m out in my garage, snap a picture and make a post, and have a handful of answers before I shut my hood. The real-time aspect of Facebook groups is underrated.

The other group that comes to mind is dedicated to disc golf in my city. People will post, “hey, I’m going solo to X course at 4:30, anyones welcome” and people will connect that way and become friends. I don’t think there’s a real replacement for these.

> all sorts of little secrets to these cars beyond a review.

Go deeper into the threads and you'll discover the secrets.

Since I neither drive a BMW nor live in USA to take advantage of the 3 independent mechanics between MI, CO, and GA, I suppose I'm not missing out on that :)

(Why'd you specially mention MI, CO, and GA?)

However, from your words I gather that NABDOG has plenty of useful information.

Hence, it's all the more important for them to have an independent website instead of living inside FB. Apart from being much more useful to a wider audience, at the very least, you'll still have the content when FB sinks ;)

> disc golf in my city

TIL that a sport called "disc golf" exists. Thanks. Like I mentioned in ancestor post, we both live in different universes.

Drive safe.