11 Xiaoke 2.0 manual, burning engine oil at 200000 km changed valve oil seal and without dismantling treatment now 290000 km basically 3000 km burn a liter, it has been 13 years, presumably there must be oil burning problem not only me, I am sure other car friends have also encountered, all say that Nissan car is really durable, this is really nothing wrong in the first 200000 km, so, realize that it may not be the engine itself After continuous understanding and learning, there are generally the following reasons for burning engine oil:
1. Most of the oil burning occurs in cars with more short distances.
First of all, this car is a manifold injection engine, which is characterized by that the intake manifold is located between the throttle and the engine intake valve. The working principle is that after the air enters the throttle and is buffered by the manifold, the air flow passage leads the air into each cylinder respectively. As for the naturally aspirated engine, because the intake manifold is located behind the throttle, when the throttle opening is small, a sufficient amount of air cannot be sucked into the cylinder. It will cause a high vacuum degree of the manifold. When the throttle opening is large, the vacuum in the intake manifold becomes smaller. Therefore, the injection fuel supply engine will install a pressure gauge on the intake manifold to supply the ECU to determine the engine load and give the right amount of fuel injection. If the short distance means that the oil temperature can not be maintained above 100 degrees Celsius continuously, so the water vapor and hydrocarbon caused by short distance driving is gasoline, and the water vapor has a great influence on the oil. The more times of cold start, the more you enter, and the longer the time is, there will be more sludge, and the oil is afraid of water. Therefore, if you blindly follow the maintenance manual and recommended maintenance mileage, the oil will decline too fast. In this way, the protection of the oil for the engine is reduced, coupled with the accumulation of years of mud into the piston ring, blockage and stagnation lead to the final oil burning problem.
Second, the relationship between burning engine oil and engine oil
There is a channeling cylinder gas in the engine, which needs to be discharged by forced ventilation through the crankcase. However, when the hydrocarbon and water vapor accumulated in the oil evaporate, it will have an adverse effect on the spring and diaphragm rubber of the waste gas valve, resulting in spring sticking and rubber aging. Although rubber has a certain degree of corrosion resistance, under the influence of the high temperature of steam and a large amount of hydrocarbons, coupled with the increase of water vapor in the oil, the oil itself may also produce more colloid, further eroding the spring and rubber. If the diaphragm is cracked or hardened by aging, the oil steam can not be separated effectively and directly into the intake manifold to participate in combustion, resulting in a gradual reduction of oil in the oil pan, showing the phenomenon of burning oil.
Therefore, for vehicles with more short-distance use, it is recommended to change the oil in advance and clean the oil circuit effectively, so as to prevent the ash produced by combustion from being too large and blocking the air ring. If the tension of the air ring is insufficient, it may lead to a greater cylinder gas problem.
I first replaced the one-way valve, the replacement of the burning oil did not improve, and then measured the cylinder pressure, the cylinder pressure is normal at least to ensure that there is no need to disassemble the engine, that is the piston ring problem, the traditional is to bubble cylinder disk shaft for non-disassembly treatment, we will be clear at a glance after detailed decomposition.
The first drawback: corrosion risk
It can only be used on cast iron engines. Security is treated differently, that is, unsafe.
Second drawback: the risk of dry friction
The crankshaft must be moved up and down continuously with the help of machine or artificial disk shaft to achieve infiltration. There is no oil lubrication between the piston and the cylinder wall. At this time, there will be metal dry friction and hard cylinder pulling.
The third drawback: eroding engine oil
Be sure to change the oil after making the bubble cylinder, and the new oil is recommended to be changed within 5000 kilometers after the bubble cylinder disk shaft is changed.
The fourth drawback: cost
The cost expenditure of 2/3 of the bubble cylinder disk shaft is the manpower cost in the operation process of the bubble cylinder disk shaft, and the most important drug solution cost is very low.
Combining the above four points, it is decided to adopt the popular filling oil and fuel release piston ring, and its advantages are as follows:
The first advantage: no corrosion
Filling tank can fully clean the oil road, including fuel injector, carbon deposition in the cylinder, ternary catalysis, fuel passing through the place can be clean, comprehensive safety.
The second advantage: no risk of dry friction
The engine itself runs the crankshaft, the cylinder wall is lubricated with organic oil, and the range of the piston running up and down is long enough. Gradually spray to the top of the piston with the help of the fuel injection nozzle and infiltrate into the piston ring. It is completely an advanced upgraded version of the bubble cylinder disk shaft. You don’t have to worry about corrosion and cylinder pulling.
Third advantage: change the oil according to the maintenance mileage, no need to change the oil in advance
The fourth advantage: cost
Under the same repair cost as the bubble cylinder disc shaft, most of the cost expenditure of the bubble cylinder disc shaft is on the disk shaft and labor cost, and there is no labor cost expenditure in the injection type, all the cost expenses are on the medicine solution, and it is certain that the quality of the medicine solution is much better than that of the bubble cylinder liquid.
To sum up, finally, under the introduction of friends, I chose the piston ring release agent of PNF technology, adding oil and gasoline, adding one maintenance cycle plus one bottle of oil, using two maintenance cycles in a row, and matching the fuel release agent for piston ring, one tank of oil plus three, six consecutive boxes of oil to dredge and release the piston ring. At present, the problem has been solved, because there is a warning. So at present, I change the oil every 5,000 kilometers, and in each maintenance cycle, I will add two more of this fuel piston ring release agent to the fuel tank to achieve cleaning and prevention. It has been repaired for a year and a half, and it has been maintained three times. Each time the oil consumption is around 500 milliliters, which can be regarded as completely getting rid of the problem of burning oil.
Finally, what I would like to say to you is that if there is a problem of burning engine oil, do not rush to deal with it. You must make a good diagnosis and inspection. Most of the burning of engine oil is caused by long-term driving habits and oil road maintenance. I hope I can share with you with my experience.
UriahPartridge 
3 
September 5, 2024 
