About 6 litres of oil if you've changed the filer too. Ordinary mineral oil or semi-synthetic if you're feeling rich.
Even if it gets very cold where you are in winters, don't go any thinner than 10W40 engine oil....if you do, then the crankshaft oil seals will start to weep as they can't cope with modern very thin oils.
Remember also that the 'MAX' mark on your dipstick is exactly that: it's the Maximum amount you can fill the level to. Try to fill it to a little below that mark, as overfilling can have serious consequences.
