Had in my Mercedes W124 Bj.87 an oil consumption of about 1 liter per 1000 km. The last oil change I have the engine cleaner additive Liqui Moly used rauszubekommen to the old dirt. With the new oil then was added the loss of oil-stop by Liqui Moly. Since the oil change I'm mostly city driving and otherwise driven mostly highway with full throttle. On the stalled since 4000 Km my car consumes just 0.5 liters of oil. Thus, the loss of oil-stop by Liqui Moly has been a great success!