Hello, my S60 2.0 T (132 kW) instead of the dealer’s mineral oil where I bought the car wanted to do something good and filled in ARAL Supertronic 0W-40. However, since that time there are sounds that I did not notice before. I asked a friend (KfZ master with a very long experience) who told me it could be the thin liquid oil. I have to say I am motor-teshish not unnecessarily, therefore not so really worried, would like to but still get some opinions or hear other experiences.