If you're using the STP Extended Life ( 10,000 Mile ) or Maximum Life ( 15,000 Mile ) filters, you're all set... those are both excellent filters... If you are using the basic filter in the blue box, i'd i'd recommend you change after 3,000 miles... and preferably with conventional... If you are using Synthetic, you should use either of the first two filters I mentioned above... Can't go wrong with either one.