Engine knocking, or detonation, occurs when fuel in the cylinders ignites unevenly, causing metallic pinging sounds, reduced power, and potential engine damage. Key causes include low-octane fuel, ...

My car requires premium gas, but I filled the tank with a lower grade gas, causing a knocking sound. I then put in an octane additive. How long does it take for the knocking to go away? – Brett Octane ...