Best oil filter is a Toyota oil filter. I get them 10 at a time off eBay for $4 apiece. According to Blackstone labs, I.e., those guys who analyze oil for a living, there is no significant difference between brands, so they never recommend brands. Their techs go back and forth between meijer (like wal mart for those who don't know), and super-tech brands and any old thing they can find on the shelves. They always analyze afterwards, and literally always have found <.05% difference between no name oils and name brands. To be fair though, I have not seen a comparison to straight synthetic.