Right, I also have very large, very expensive stereo equipment, which certainly isn't necessary. And in reality with the dual filter and Amsoil or Donaldson filters I would most likely get just as good of service form Mobil 1 or Havolin, I just prefer the better stuff. You should spring for an oil analysis once JFTHOI just to see what it says. Depending in the quality of your filters you may be shocked to see that it's as good as it was when it came out the bottle.