Engine oil KV6

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Posts
35
Location
Jordan
Good day,

I always use 10w 40 oil for my car's engine, but lately I noticed the sounds of friction in the morning, ( not sure if valve tick or rod knock !! ) but they lessen with movement. My question is, can I change the viscosity of the oil to become 20w 50 ?
183000 KM on clock
Regards...
 
Last edited:
20/50 is pretty thick, I would say to thick for a modern engine like the kv6, tbh I would have thought it was on 5/30?
 
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