I believe most people including HD service techs agree that K&N air filters are superior to HD's. If this is true does the same hold true for their oil filter?
Harley filters are made by Champion. If I was to use something other than the HD I would use a Mobil 1 M 102 or Purolator PL 14476 or PL 14477. They are both equal to the HD premium and cost less especially the Purolator. Both made by Champion.