I have a CK27 that I bought to replace my old Mitsubishi. I haven't put 50 hours on it yet. I checked at an auto parts store but they couldn't find a replacement. I will just pay the $40 if I can't find a substitute, but $40 is alot for an oil filter! The dealer I bought it from also said I can skip the first hydraulic oil change, as the filter gets all the metal. When they change the oil the shop puts it in their old tractors rather than throw it away. I will still pull the plug to see how much metal is in the sump.