Yes, there should be a copper or fiber type washer at the top rubber seal where the lid contacts the main oil filter housing.
.I would use regular 30wt. oil.
Synthetic will not allow the engine to break-in properly.


There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!