I'm a little bias when it comes to oil. How good is Penzoil or Quaker State compare to Castrol?
How about garages for Aircare?
Am I doing my car a dis-service(no pun intnded) if I go to a repair shop that offers a package deal (ie oil change,tire rotation, lube etc) compare to a shop that charges $30 for oil change and another $90 for Tune up?