Hi all I'm new to the site but have a question already. In january i bought a 55 plate citroen c5 1.8i 16v petrol design estate, I have coveted 13000 miles in it and have had to top up the oil 3 times totaling about 800-900 ml is this normal? I have no signs of leakage no mayonnaise and I don't kick out loads of smoke from the exhaust I've tag on some pages that 100ml every 1000 miles is considered within tollerence but would rather ask you guys what you think. The car is used as a taxi so is always running any advice from you is much appreciated.