Motor oil
10W-WTF!? Dispelling Myths About Oil -- /ENGINEERED
Brakes - mostly in a nutshell. Lots to read between the lines, but for the most part, this is a good primer to learn from.
The Thing About Brakes Is THIS -- /ENGINEERED
Figured there are a varied mix of enthusiasts here: stock and modified users.
Anyway you shake it, we can all learn from what these guys are going to tell you.
I learned something from these videos and also was able to see some stuff they that they left out, for various reasons, so be aware of that. Sometimes things are left out
because topics are quite technical but where they don't go into it, they get the main points that need to be impressed upon you, over to your side of the table.