what oil u fellas using ??? just topped up with some Castrol SLX 2 synthetic (0/w30?)as my engine was bone dry not a fecking drop in it thinking it will need more than the 1 litre i whacked in last nite this is pretty expensive oil the synthetic stuff (app.esp for VAG engines with AVS service intervals) 40 quid for 3.5 litres this what u all using ????