I have always thought Valvoline performed well especially the MaxLife versions. These UOAs seem to indicate that Valvoline motor oils are great...
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=003404
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=003075
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=003021
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=3;t=002836
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=003404
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=003075
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=003021
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=3;t=002836