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Synthetic Oil in older tractors?

39002 Views 32 Replies 15 Participants Last post by  gaheard52
So I have started a side business of working on and restoring older tractors. I have put up some pictures on here in my gallery of one of them. I am getting a lot of people who want thier oil changed over to synthetic. Is it OK to run synthetic in a 4020 or 3020? Some people say it shrinks the seals, others say it will leak because its so much thinner. Other say its a myth. I would really like a good answer I can give my clients an feel confident that I am telling them the truth?
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I really can't see that one different in the cost of synthetic oil then conventional motor oil today I use synthetic in everything I use truck's or my oil tractor 🚜
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