valving sound going rougher..

[zero2hundred]

Guys, i noticed that after i changed my engine oil to lower viscosity grade 10w-40 HKS semi-syn , i can hear the rougher the valves sound come out from the rocker head...how come huh ? does it harmful to the engine ? previously i was using AMOIL turbo plus oil, but not so sure whats the grade d..but confirm not semi-syn wan...im using e2 63T engine now currently...pls advise...thanks in advance...

 

[huakenny]

engine oil not suit u...if engine oil level not decreasing then no harm.

just u wil get the irritating tappet sound

 

[zero2hundred]

hmm...i tot syn oil normally will be decrease the oil level abit wan no matter wat...becos of the quality made of the oil...