"engine oil burning" means that engine oil enters engine's combustion chamber and participates in combustion along with mixture. The phenomenon of "engine oil burning" in car will damage oxygen sensor of car too quickly, resulting in increased carbon deposits in combustion chamber, unstable idle speed, poor acceleration, increased fuel consumption, and excessive exhaust emissions. damage that is difficult to repair or even dispose of, leading to a significant increase in maintenance costs and even a hidden risk of accidents
Today, a netizen was consulted who said that his car consumes 1% engine oil per 100 km. If this situation is considered burning engine oil, what should I do?
I don’t know how he considers oil consumption, but this situation should relate to engine oil burnout. What to do specifically, you need to find out specific cause of engine oil burnout and then treat it symptomatically.
Conventional automotive engines are four-stroke reciprocating piston engines. Due to design defects, this type of engine burns oil naturally, which is inevitable for any engine. As long as amount of oil burned does not exceed a certain level, we can ignore it. In 1980s, China once issued a national standard, as long as oil consumption does not exceed 0.3 liters per thousand kilometers, it is considered normal. But at that time, Chinese auto industry was still underdeveloped, and there were few cars, so this standard was formulated for trucks. Later, with rapid development of China's automobile industry, passenger cars became more and more advanced, and engine technology became more and more advanced. This standard was obviously too loose (but some car companies used it as a standard for working with consumers). .
Despite fact that it is free, state has not revised this standard, but it no longer applies to passenger cars.
The current default standard in automotive industry is that if your vehicle does not need to top up with oil during an oil change cycle, this is normal and is not considered an oil burn. Your car consumes 1% of oil per 100 km. If oil volume is 4 liters, it will consume 0.4 liters of oil per thousand kilometers. It will consume two liters of oil per 5000 kilometers. The oil has run out. By this standard, your car not only eats oil, but also eats very seriously.
What causes an engine to burn oil?
There are many reasons for burning oil in an engine, such as aging of piston rings, reduced elasticity, carbon deposits on piston rings, excessive clearance between piston and cylinder wall, oil leakage from valve seal, failure of forced crankcase ventilation device, boost If device damaged, etc., this requires an experienced repairman to carry out a special check.
The vast majority of these are caused by broken piston rings, and an engine overhaul is required to fix problem. Personally, I suggest you also try using a motor oil with a slightly higher viscosity or use some motor oil additives.
How to prevent engine oil fires
1. Be sure to use engine oil that meets vehicle's specifications. The first thing to pay attention to is quality indicator of used engine oil, and second is to pay attention to its viscosity index. In terms of quality, try to use an engine oil with a class higher than SL, and viscosity index must also strictly comply with viscosity index regulation in car's owner's manual, not too low and not too high.
2. Avoid frequent fast accelerations and prolonged driving at super high speeds. When operating at ultra-high speed, engine easily causes lubricating oil film to break when engine rotates at ultra-high speed, resulting in poor lubrication and dry grinding of rotating parts.
3. When filling with engine oil, it must meet relevant specifications. When amount of added oil exceeds center line, technician should be asked to pump out excess oil. In addition, observed amount of oil is mainly based on amount observed before leaving car next day.
4. If you find that car is eating oil, go to a service station for inspection and repair as soon as possible.