Originally Posted by AusMBtech

...Advisors don't want to call customers at tell them they need a $200-300 filter ontop of a few thousand dollars worth of service, brakes and service items. The owners rarely want to spend that money when they don't get a benifit they can feel or see.

Charcol filters aren't worth it, combination filters are the way to go in terms of cost Vs benifit, charcol are way too expensive.