right, ive changed the oil today after a few months of the engine soundin a bit ill, only to find when i drained it there was only about 1 litre of the horrid black stuff in there and thats after letting it drain for 20 mins after about 20mins thrashin, the engine is a 1.6 sohc and i swear it should hold more than 1 litre, i bought a 4.5L bottle of oil and put about4L in and that sits at just below the max mark on the dipstick thats how it should be right???