Previously using Mobil Super 1000 15w40 and after that, Honda Vtec Lev 10w30 which are all Mineral Oil ...

Engine was ok and noise is normal ..

Change to Mobil Super 2000 10w40 Semi-Synthetic Oil .. Now the engine is very audible .. You can the valve tappets ticking ...

Is it a normal noise of semi synthetic engine ?? Will it damage my engine in the long run ?? Or is it only Mobil because some say Caltex Havoline Semi Synthetic offers a silent engine ...

Should I go back to Mineral Oil ???

Car is Corolla .. Engine is 1.6 4afe ...