Manual says it is normal to consume .1 liters every 600 miles. But it also says consumption can be higher if you drive more at high engine speeds (probably most of us). What is your experience in terms of how much oil you are consuming? Had to fill mine today even though the annual service was just a month ago, and it has me a little worried. I drove my Porsche Turbo S hard, and I never had to add a drop of oil.