So a few days ago, I noticed this sound coming from the car. I thought something was wrong, but I just pushed to the back of my head. I drove the car yesterday AND today, it makes this noise, but only when it has warmed up and only at idle. Once you are past 1000rpms the sound is gone. It sounds really strange.
It doesn't sound like a bad bearing, plus their is no oil pressure issues. Do you think it has to do with the fuel I am using? I can only get fuel with ethanol in it. No knocking and the car runs fine as well. This is really damn annoying and it has me insanely stressed.