If you have a book for your A look up what they say to use and think about it. If my memory is right it was 30w and now the same oil would be a 40w oil. The oil you are using in it is for a diesel built after 2002 a lot different than a 60 year old engine was designed to run on. I have a 76 model diesel from overseas and 15w40 will run about 10 min and no oil pressure changed to a strait 40w diesel and now it holds 40 psi all day long. Oil aint oil anymore. Bandit
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Today's Featured Article - Self-Starting Tractor - McCormick 10-20 - by Francis J. Robinson. I remember it very clearly even though it was almost 50 years ago and I was only about seven years old. My Dad had purchased a new Ford-Ferguson tractor and basic set of implements when he started farming just about the beginning of W.W.II. It was considered a pretty nice outfit for their 70 acre central Indiana grain and livestock farm. Dad spent several years during the war testing aircraft engines at Allison Engineering in Indianapolis working seven days a week on a twelve hour night sh
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