my buddy had a firefly for a beater, he added 2 liters one day because he drove the hell out of it, then the next day he added 2 more not remembering the day before he added 2, doing 150 on the 401 downhill with the wind at our backs the 3 cylinder, just went blah! oil everywhere, then no power, our speed dropped like a rock, good thing it was a 200$ car, and he didnt care, he had another firefly identical he paid 250 for so no problem lol. So hopefully you dont do this to your car, cause by the sounds of it you have over 8 liters of oil in the engine. Not good I wouldnt drive it, until to rectify that, hopefully the oil hasnt blown a seal and caused that leak maybe its just overflowing out of somewhere or some valve (I'm not sure what im talking about really lol)