what is a good oil filter for my 03 vulcan . what part numbers are they. I was looking at at some that $5 or less and then there are some over $12. I have a wix on there now but next change I want to use synthetic oil. I read bobtheoilguy.com and they recommend purolater (ford) , wix, mobil one, k&n, napa gold, ,but also say that champ labs (many) like bosch, supertech, deusch, stp, proline, are o.k. too. I do avoid fram because they are inconsistent. I was just wondering what everyone else is using on their bulls.