[The Atomic Ass]

Originally Posted by pgfpro

But the dang thing pings all the time when I'm on the on ramp so I decied what the heck i'll try a higher grade fuel.

But does the Check Engine light come on? The computer will retard ignition timing to avoid detonation, so unless something is seriously amiss with that engine, you're probably hearing something else. Radiator fan just tickling the shroud perhaps?