I have an 02 P5 and have a question regarding oil. 1) if the engine oil is low can the check engine light come on? 2) i checked the oil level and figure i should put some in, there is about 1000km until its due for a change but what oil do i put in?? the sticker on my window doesnt tell me whats in it, just where it was changed and when t ochange it! any suggestions?