2006 2.5i Limited Manual
I've recently noticed that my engine sounds louder, and I can't tell if it's actually getting louder or if I'm going crazy. I notice it most when I'm driving on the highway at ~70-80 MPH with the engine sitting around 3500-4000 RPM, and when I'm just standing next to the car with the engine running. I know it's not wheel bearings or anything south of the engine because if I'm cruising at 75 and I take it out of gear and let the RPM settle it gets noticeably quieter. It's especially loud under load, but that isn't exactly surprising. It doesn't sound like an exhaust leak either. Anyone have any ideas?