Honestly man, this whole shadow hiding thing gets blown way out of proportion every time it comes up. Yelp has an algorithm that filters reviews for a reason, and yeah sometimes real ones get caught in it, but that does not mean there is some big plan to bury your one star posts. I have had reviews disappear too and it usually comes back or it was just flagged by the filter for dumb stuff like wording or account age. If you want to see what still shows up, just open your post in a private browser window while logged out, that is the easiest workaround and it takes two seconds. Sending a link to friends proves nothing because links always work even on hidden stuff, so that test was never gonna tell you much. Ngl people act like Yelp is out to get them personally when mostly it is just bots and filters doing their thing badly.

Who hasn't looked at a spec plate and thought "meh, close enough"? I ran 68 in everything for years too, figured thick oil equals happy compressor, and my track record was good right up until it wasn't. Your sludge story is a good reminder that the plate is there for a reason, even when we think we know better.