I kinda look at the forum vs Facebook thing like the difference between a group of car guys and a car show. The group will share experiences, offer advice, have a few laughs and in general, have a good amount of respect for each other.
FB groups is like a free car show, where they let anyone in, and the conversations typically follow the path of:
5 posts saying they had the exact same car back in the day and wish they hadn't sold it, but it was a different year, a different color, a straight six and in the end, you find out it was really an AMC Pacer.
23 posts with out of focus pictures of their car and no input toward the OT.
3 posts so badly mis-spelled you don't have a clue what they are trying to get across
4 posts calling out the badly mis-spelled posts
15 posts calling the 4 responders "grammar/spelling nazis"
3 posts with incorrect information
6 posts calling out the bad info
3 posts from the bad info posters, saying "that's how it was cuz I bought it off the delayer's lot like that"
1 post that is actually OT and answers the OP.