I like how people are like call Parker like he's some kind mechanic
Next thing u know they will be asking him how to improve lap times at the nurburgring 
Parker is.a car enthusiast.... but thats it. He doesnt really have much hands on experience or actual drive time, but he reads everything there is to read and keeps up with all the cars he wishes he could afford.
Nothing wrong with that at all, I wish more people were like him in our industry. Unfortunately without the hands on day to day experience in the real world he doesn't have the knowledge to separate the bullshit from fact with his sources, so much of the knowledge he shares is either half truths or just BS hes passinflg along from wherever he heard it.
much of what he says is based in reality. You just have to understand the source before you take what he says as fact.