Sorry for the double post, but figured some folks might not read the other thread as the subject of it ("Popular Mechanics article") doesn't really give you much insight into the subject matter.
Anyway, I scanned in an interesting article from the April 1976 issue of Popular Science magazine titled "The Big Debate Over Synthetic Oils For Your Car". The 12.5MB PDF of this article has been posted in this message thread:
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=42;t=002840
Anyway, I scanned in an interesting article from the April 1976 issue of Popular Science magazine titled "The Big Debate Over Synthetic Oils For Your Car". The 12.5MB PDF of this article has been posted in this message thread:
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=42;t=002840