I'm sure this will turn into an oil debate. Here is my 2 cents. Any oil today is far better than what these old tractors have used in the past 40 plus years. Most guys I know use 15W-40 because tgey buy it in bulk for their diesel tractors. And its said to have zinc which is supposed to be good for these old engines. There is also a ZDDP zinc additive that some people use. I use 15W-40 in most of mine and non detergent SAE 50 in some of my oldest ones. Using SAE 30 won't harm a thing. Everyone will have an opinion on what is best to use. This is just my thoughts and opinions and what I use in mine
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Today's Featured Article - Tuning-Up Your Tractor: Secondary Ignition Wires and Distributor - by Curtis Von Fange. In our last episode we spent the entire day checking out the spark plugs. Is that efficency? Actually, it took more time to explain than it really did to do the inspection. At any rate we decided that a compression test was in order so we could verify the internal engine status. That way we wouldn't buy any tune up parts until we were sure that the engine was in reasonable mechanical condition. Our tests showed a fictional compression reading of 85, 80, 82 and 86 psi. That is well within a
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