Yea, I doubt it is just bad gas since the high pitch noise has nothing to do with a running engine. I fact, if I turn on accessory when car wasnt run...the sound is not there.
It only is after I drive the car do I hear it. Almost as if the engine is still under pressure from the drive. And after the drive and engine is running I can hear it over top of the engine noise...I just turn off engine and turn on accessory in order to hear exactly where it is coming from.
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