If you maintain your vehicles you probably either change the oil or have it changed regularly. Most people worry more about what brand of oil to use instaead of learning what weight oil and what brand oil filter they should use. Do some research about YOUR vehicle and what weight oil should be in it, don't just go with what your Dad or your friend recommends. Be sure to use a high quality filter, not all filters are created equal. A filter that the manufacturer uses is usually a safe bet (Motorcraft,AC Delco) if not then a Wix or a NAPA gold is a good choice. Beware of quicklube oil change look alike filters. I know Wal-Mart uses Fram filters that are not the same as the Fram filters they sell off of their shelves in the store. It looks similar but is specially made for their shops and is different internally.