seiddy

I've always filled up my car with Petronas RON97, last night I filled my tank up at Petronas station jalan ampang (from ampang point, it is located next to Shell station near Ampang Point before Chevrolet showrrom and Gleneagles hospital). After filled up, the car sounded like i just filled the tank up with either RON95/Diesel and worst now that I am hearing a more clanking sound. I felt like there was a low grade petrol being used on RON97 pump. The ride is not as smooth as it normally would be.