The consequences of adding more oil to the car is that it will make the engine work crankshaft handle, connecting rod big end of the oil stirred violently, not only increased the internal power loss when the engine is working, but also due to the churning of the oil shot to the cylinder wall increased, easy to produce the failure of the burning discharge of oil, but also exacerbated the carbon deposits in the combustion chamber. The following is about the impact of adding more motor oil to the car: 1, affect the power output, increase fuel consumption; 2, engine power loss; 3, will cause poisoning of the three-way catalytic converter; 4, will burn oil.