Car(civic vti) is currently loosing a lot of engine oil. I've already put 4 liters in over a few months\maybe 1000k miles. Mechanics cannot find any leaks but they couldn't see smoke coming out of the exhaust either.
If you have internal leaks i.e. the oil is being burnt will this always be accompanied by exhaust smoke or can it occur without exhaust smoke in which case, should I accept that my engine is burning oil and I need a rebuild since no external leaks have been identified?
Would there be other ways to diagnose that my piston rings or valves are causing the burning, would a compression test help?