Hello everybody! Our Omega has always used some water for several years (0.5 l/10,000 km). But now I have to refill half a litre of water every week (after about 300 km). The pressure of the cooler has not shown any fault. There is also no liquid leak under the car or anywhere else to see. There is no oil film visible on the cooling water and no bubbles when the engine is running. Where can the cooling water loss have its cause? Does anyone have an idea? and above all – can you go on like this? Does a means “cooler-proof” or similar help, or should you dare to do so? Many greetings omegafan 7