Uganda, April 25 -- Hello Paul, I have a Toyota Vitz 1.3L 2009 model with a 2SZ fe engine. The engine oil level goes down by 300ml every 1,000kms. There is no leakage in the engine or under the car. It is mainly driven in the city centre daily for about 20 to 30kms only. The inside of the exhaust is black but does not emit smoke. Please help me diagnose the problem.

Zahil

Hello Zahir, it seems your Toyota Vitz 2SZ engine burns about 1.5 litres of engine oil for every 5,000km service interval, which is quite a lot. The absence of any oil leaking points around the engine points in the direction of worn out piston rings inside the engine, which should be confirmed with an inspection. A normal engine is expected to burn or consume about 0.5...