Sorry if I've missed any previous threads on this topic for this age of petrol engine, but at factory, what grade of oil is used with the 1.4 85PS petrol engine - car is an October 2009 new build. I have seen Castrol SLX ?W-?? on the accessory stands and VW seem to use this with the new Polo 1.2 60PS (it was in the boot of a display car) - but I don't know the actual oil "weight". Thanks!