Would like to find out if there is anyone who experienced your vehicle's engine showing a knocking sound during acceleration with Petronas Primax 95 fuel.
In my case, the knocking sound only happens with one car, the Proton Preve Turbo. It doesn't happen with other cars which include Ford Focus and Mazda CX5.
I am certain that it is fuel related because I hands been driving the Proton Preve Turbo for almost 6 years now. It first started to show knocking after about 1 year from new with Petronas fuel. At first I thought something wasn't right but after I switched to Caltex, the engine knocking sound was gone. I drove the car solely on Caltex for about 3 years and there was not a hint of the engine knocking. But lately I got a company petrol card so I started to switch to Petronas again. The moment I switched to Petronas, the knocking sound came back.
I suspect there is something with the Petronas fuel that is not very suitable for the Turbo engine of the Proton Preve. There is no issue at all with Caltex fuel .
Is there any other owner who made the same observation and if yes, what is your car? Fwiw there is no difference with the new Primax with Pro-drive formula as shown in another thread here. The knocking sound is still there.
Engine Knocking Sound with Petronas Primax 95