Check the oil cover
Unscrew the filler lid and turn it over to see the bottom, which can be seen on the bottom of the refueling lid and traces of the old oil or even dirty oil. If the bottom surface of the refueling mouth has a layer of dark emulsion with a sticky consistency, there is a small water droplets mixed with oil, this is not normal situation, may be the cylinder pad, cylinder head or cylinder body damage, resulting in the cooling fluid into the lubricating oil. If this happens, the contaminated lubricant will cause harm to the internal engine and it needs to be overhauled.
Second, check the amount of lubricating oil
If the refueling mouth cover is no problem, then find the lubricant ruler, then pull it out, first check the oil surface, the oil surface height should be in the "full" or "fully" position.
If the oil surface is too low, will damage the engine due to poor lubrication, but also to the valve, cylinder pads, piston ring damage. Inspect the bottom of the car to see if there is leakage of lubricating oil, if there is a condition to detect the pressure of the cylinder, whether there is leakage and damage to the engine parts.
Third, through the exhaust inspection
If the exhaust is blue smoke, indicating valve oil seal failure, lubricating oil into the cylinder combustion chamber, may also be the piston ring and cylinder wall clearance too large or piston ring fault, etc. or due to the engine oil seals and oil seal aging and damage, resulting in oil leakage, excessive consumption of lubricating oil.
IV. Color of lubricating oil
Can take out a paper towel, pull out the lubricating oil ruler to wipe on the sheet, observes the lubricating oil color and the impurity condition. Generally after the lubricating oil, the vehicle used for a period of time after the lubricant will become black, this is normal. Other colors are abnormal. If the color of the lubricating oil is found to be gray, white or emulsifying, it is indicated that the lubricating oil is mixed with water. It is possible that the engine cooling system and the combustion system have connected leakage.