The replacement of lubricating oil is a required course for automobile maintenance. Doing this step is one of the keys to protect the engine and save petrol. But if the lubricant is not used properly, it will backfire.

For example, some owners think that the oil can be added more, every time to fill up, for fear that their love car "not enough." In particular, every time you see the 4S shop, there will be some left after you change the lubricant. You can't see it any more. You must add it all. In fact, such a "love" way is wrong!

If too much lubricating oil is added, it may lead to lubricating oil burning into the combustion chamber from the gap between the cylinder and piston, resulting in carbon deposition. The harms of carbon deposit believe that many owners have heard, in addition to the more easy to produce detonation, it is easy to cause early combustion, aggravate the cylinder and piston wear, pollution and other problems. What's more, burning oil and blue smoke will also become possible.

Of course, if too little lubricating oil, and the engine lubrication is not enough, it will also cause parts wear. So the best way to do it is to refuel by the marking line and check the oil amount by the oil scale before each drive, as long as it is normal between MIN and MAX. But remember, check in the cold machine.

Finally, one more point. If the 4S is left after the lube oil is left, the remaining lubricant can be taken away and reused next time. In this way, there is no need to get entangled in whether or not to add oil to the spot.