heres the story my oil was a bit low so i topped it up with the same stuff and since then ive got this annoying noise it happens when slowing down and when im revving symptons of bottom end so ive been told and read but hthing is its a squeky noise like when you have hot brakes not a knocking noise and it only does it when the car is warm and between 2000-3000 rpm is really annoying no loss of power so water lost temp fine everything else ok