Detergent oil does not really clean, it just keeps the solids in suspension longer and that feature tends to keep the engine cleaner.
That being said, I have switched many old tractors over to detergent oil and have never ever caused a problem with using it. I started doing this in the late sixties when you could still buy them that had never seen detergent oil.
The tractor is designed to last 50 years with an inferior oil, who knows how long they will last with modern oil? The engine can not tell if you put multi weight oil in it. It only sees 40 wt when it is hot and 10 wt when it is cold if you use 10w40. I use 20w50 because 50 wt is not too heavy once it gets hot and on some worn tractors it helps maintain oil pressure.
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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