Innocent bhai ( sorry don't know your name )
Just for once try liqui moly 5w-30 semi synthetic or 5w-40 fully synthetic.
You will forget what shell is.
I recently changed my 9th gens oil to LM 5w-40 fully synthetic... and I am in love with my ride. The average has increased and ride has gotten so smooth ... all roughness has been removed. Moreover my ride has got responsive at the same time.
Give it a try
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