 After driving a Protege for 10 years and 250,000 miles, the 3 S seemed like a great car until I used a Jiffy Lube and cracked the poorly designed oil cartridge housing on the car.  Mazda says tough luck, but has issued a service bulletin, and I believe reverted back to the cannister versus the cartridge oil filter.   It is sad to say that such a nice car can be ruined by poor design - but in my case (and from what I hear) the case of several other Mazda 3 s owners, that you will have to pay $60.00 at the dealership to make sure that your engine does not suffer major damages.  I believe the 2005 model also has this type of filter so be prepared!