I run straight 30W castrol in my Case 800 but it is the heavy duty stuff for that type of engine.
I wouldn't use regular "automotive" oil ONLY for the reason of being lower zinc levels. 1 change probably won't hurt anything but the next change i would do some research and find some "normal" or high zinc content oils. AMSOIL makes a high zinc (Z-rod) oil mostly for the antique car crowd but would certainly work on our old tractors too.
remember not all oils (synthetic or conventional) are created equal. even from the same company. if they are API certified they meat a MINIMUM spec and that's all. if you want a better oil you need to look at the TBN value. the higher the number the better the oil.
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Today's Featured Article - Gettin My Old Tractor Home - by Clayton Sweeney. My name is Clayton Sweeney. I am from Southern Maryland in a small town called Lothian. I am 20 and my father and I are the proud owner of a 1954 Allis Chalmers WD-45. When I was 18, I dated a girl in the next county over. Her family are tobacco farmers. It was a cold Thanksgiving evening, and we were going up to her Grandparents house. As we passed one of their barns, I noticed something orange in the corner of my eye in this old shed. It was pretty dark and I asked what it was
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