I tend to be blunt sometimes. Most, probably all sayings about non-detergent vs detergent oils are myths. Detergent oil has been used since the 50's. Most old engines with have sludge regardless of what oil has been used, mostly through neglect, unless they have had a fairly recent overhaul. Clean the pan, the valve cover, and the pushrod area behind the cover on the right side of the engine. Put detergent in it. If you don't want to do that, put detergent in it anyway. I really doubt if you are going to break anything loose. Detergent keeps the impurities in suspension, if changed regularly. it is not a cleaning agent, as in cleaning an engine.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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