Well 80% mechanics don't know anything about oil's they just know thick oil and thin oil.
According to them thick oil is very good..... But reality is we should stick to manufacturer recommendations.
20W50 oil for this carby cultus with hydraulic tappets is like a slow poison.
In this kind of tappet arrangement thin oil's should be used like 10W40, 10W30, 5W30...
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