I want complaint about my car toyota vios engine every time when driving to 80kmj engine appears knocking sound. I complained to the Toyota Segambut service center, but they give a stupid reason, say this is a very common thing. I was driving a car just one year, meter reading only 14000km.. The technician say the problem is oil, want to change other brands of oil, last time i use SHELL V-power 97, then now i changed to petronas Primax 95, but still the same after I changed. IS THIS ENGINE KNOCKING SOUND IS RELATED TO THE OIL PRODUCT OR... read full review »