Had to change the oil in my gray-market L1500DT yesterday and had oil out and ready to put in new filter (bought at local Kubota dealer) and what, what? The filter did NOT fit. The former was a WIX 51342 which I had the dealer cross-reference but apparently his result was incorrect. Long story short, got the filter from NAPA and I was good to go! After the fact, I found this forum and I'm impressed with the level of knowledge exchanged here. I "inherited" Kubbie and am taking care of him as best as I can with the help of friends. Thanks, TractorByNet for being around!