I know at least 5 litres came out, how do I know..... I only had a 4 litre tub to drop it in, so had to screw the drain plug back in through the warm oil, then pour that into a larger container and then drain the rest out.
Maybe I haven't run it long enough to get the oil back round,.
I didn't want to run it too long but I suppose if its got 4 litres in, it'll pick up OK to distribute around engine, so I'll try again tomorrow and run it for longer I can always stick another litre in it first to be on the safe side.
Thanks Mark.