The M1 filters are $15 each at Cdn Tire.
I've only had the Civic for about a year and have already put on 30k kms. I have no idea what oil/filter combo the previous owner had but so far so good. I had to use the Fram filter once because of Cdn Tire's promotion where you get it free with a purchase of a jug of Castrol GTX. I have yet thought of doing a UOA but will probably extend the change to 8k kms.
PS...I really like the Napa Gold filters, imo they are great for the money and I'm thinking of buying a master pack.