Probein

And no, I don't mean it moans when I leave my dirty washing on the floor.. hahaha.

Anyway, yea, I've started noticing that at higher speeds (65 onwards really) I get an audible 'whine' from the engine. It's hard to explain how it sounds, but it's quite high pitched and.. well, whiney. It seems to be most obvious after I've used the turbo and remains constant when I'm cruising at a steady speed. It vanishes when I drop below 60.

Any idea what this could mean? Anyone ever had any similar problems? I'm hoping it might be a relatively cheap fix.