hi i have a 306 xsi 2.0 8v 1997 i did an oil change today and mesured out the oil to 4.5 litre as stated in the haynes manual. when i dipped the oil it was just under min i started the engine and ran it for 15 minutes turned it off waited 15 minutes and dipped it again still the dip stick reads just under min. does anybody know if 4.5litres is right if so how long should the dip stick be as i can only see that the wrong dip stick is in the car. anybody help?? i would be very grateful if anybody can thanks jim