The motul turbolight stuff seems pretty reasonable to me but to tell you the truth i didnt notice any difference between the other oils (Mobil 1 and the Castrol R stuff) i've used. Car drove and felt the same, engine sounded and "felt" the same.

Most important thing is to use a good filter (dont go for the shit repco ones) and remember to change your oil often and any reasonably good "performance" oil will work!