I’m pretty sure I hear my Outback pinging with mid or high test gas. The mechanics at the dealership drove the car with a diagnostic gizmo attached and reported that they could not generate any pinging. If I’m not hearing ping, what am I hearing? If it is ping, what can I do? Thanks.
Your Outback only requires regular fuel. Does it ping in your ears with that fuel also?
Did you point out the noise to the tech while driving around to let him determine what it was?
Sometimes carbon buildup can happen and some folks like to use Seafoam to clean it out. By revving the engine and pouring some Seafoam slowly into the intake it will dislodge the buildup.