Since I have chosen a N53 – 30i engine, I can choose between the following carts: 330i from 2006/7 – (1.59 tons) 530i from 2006/7 – (1.62 tons) 630i from 2004 – (1.795 tons) But now the 330i Touring should swallow 9.6 liters inside and the 630i 14.2 liters… First of all – is the consumption right at all? And if so, how does it come to such a difference with less than 200 kg difference? Thicker air conditioning and stereo alone can’t be, od him?