Hello Motortalker have a Opel Signum 2.2 direct BJ. 2004. 228000 and he has run mad oil usage with 5 liters per thousand km.. Often only filled up after 100 km.. Matching Dexos 2 oil not always had… Sometime from 5W30 to 5W40 with expensive oil without Dexos2 release, it ran noticeably softer. Then I had in the hope that even thicker oil improved the thing again a 10W/0 oil of the same brand LiquiMoli filled: After 50 km stutter, engine sign and in the workshop when reading out 3 cylinders. Oil change made, everything out and again Dexos 2 5 W 40 oil pure plus 4 new sparks. After that he ran 40 km all cylinders, only at idle he shakes at the traffic light at 600 revolutions.. In the workshop they then gave in idle 5x full throttle until Visichtbat engine smoked in front and pressed out oil.. It would be engine damage, stops at some point… I then filled up again after 40 km half-liter oil, and now r runs again on all cylinders. Nevertheless, Werkstatt Jungmechaniker thinks that with so much oil consumption the cat can go up to 1000 degrees, burst and burn out the vehicle…..thanks for the conversation.. Now I don’t know if I should move the vehicle on short distances without too much… since the new engine with installation or repairing new piston rings is probably not worth…1000 euros upwards… What do you think? Frank