Quoting Removed, click Modern View to see "If tractor sits for a few day, more than half the oil in the filter will slowly drain back the crank case."
Doesn't matter George, whether factory can or spin on, they both use an 'anti-drain back' valve.....if you are generous in the use of the word "valve". Just a flimsy fiber/cardboard/maybe plasticized material inside the inlet of a spin-on and against the engine block behind filter mount with the factory can type. Oil pressure pushes it open & no pressure lets it relax to "seal" (again generous word usage) and prevent flow back out of the filter inlet into engine when stopped. Well, again being really generous, if that inlet check valve really functioned, you still end up with a half empty filter/can, because there is not a darn thing to prevent the filter contents from emptying out (down to half) via the filter outlet! Just the way it is & was designed. Life is tough!
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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