The importance of regular oil replacement-lubricant
Author：online oil monitorin Time：2021-11-16 16:40
Many friends who drive do not have a clear oil change interval. They only change the oil when they feel that the engine sound is wrong or the engine is not running well; INZOC online oil monitoring is an expert in lubricant monitoring, combined with years of oil monitoring and oil product testing. Experience reminds everyone that the oil must be changed regularly!
Then, the following is the analysis of why the oil should be changed regularly by the lubricant inspection expert:
When the engine is working, its internal working conditions are very severe and demanding, under high temperature, high heat, high speed and irregular changes. Metal chips produced by friction of various parts. Dust invaded from the air, acidic substances generated by combustion, and some incompletely burned fuel are mixed into the engine oil, resulting in a decrease in the viscosity of the engine oil; part of the exhaust gas from the combustion chamber rushes into the crankcase and brings in acids and other components to deteriorate the engine oil. To make it unable to achieve its due function, this will affect the working efficiency and life of the engine, so the car must change the oil after a certain mileage.
At the same time, due to the accumulation of various impurities in the oil filter, its filtering and cleaning performance will also decline, so the filter should be replaced regularly with the oil. Install inferior oil filter from the surface. Temporarily speaking, it will not cause damage to the engine immediately, but if inferior filters are used for a long time, they will not have a good filter protection effect due to their poor filterability, which will inevitably accelerate the abnormal wear of the engine.
The importance of regular oil replacement-lubricant inspection experts will answer for you
When adding engine oil, in addition to selecting engine oil of suitable viscosity and quality, it should also be noted that the engine oil should not be added too much or too little. The oil level should be between the LOW and FULL positions of the dipstick. An oil level that is too low will result in a decrease in the oil volume of the oil pump. Sufficient oil pressure cannot be formed, and the working requirements of various parts cannot be guaranteed; too high oil level is also inappropriate, because too high oil level will cause the oil level in the oil pan (commonly known as "oil pan") to be too high. When the engine is running. The big end of the connecting rod of the crankshaft connecting rod mechanism and the crankshaft crank mechanism will hit the oil surface at high speed during operation. Excessive oil mist and splashing oil are formed in the crankcase. On the one hand, this will increase the running resistance of the engine, and it will also aggravate the formation of carbon deposits on the outer wall of the combustion chamber and the piston. Forever. It will also cause the piston ring to be scorched, causing serious consequences such as burning oil in the engine.
The replacement of oil and oil filter generally takes 5000 kilometers as a replacement cycle. New cars and vehicles that have just been overhauled should preferably be replaced around 2000 kilometers so that the metal debris generated during the engine running-in period can be removed in time. If the oil is not replaced for a long time, it will not be able to form an effective oil film due to its viscosity, cleanliness and other functional indexes are severely reduced. Its various functions will be severely degraded. If things go on like this, the normal life of the engine will be greatly shortened, bringing the trouble of "saving sesame seeds and dropping watermelons" to vehicle maintenance and greatly shortening the interval between engine overhauls.
Answers to questions about lubricating oil detection: the significance of detecting the tendency of lubricating oil paint film.
Lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It is mainly used for lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. Complex mixture of hydrocarbons.
Paint film is a kind of high molecular hydrocarbon polymer, which is the oxidation product of lubricating oil. The color ranges from light brown, brown to tan. So, why does lubricant testing need to detect the tendency of oil paint film? The oil paint film tendency index is to evaluate the tendency of oil products to produce paint film. Therefore, the oil paint film tendency should be detected when the lubricant is tested. The testing equipment is an MPC tester.
Why lubricating oil testing needs to detect the tendency of oil paint film.
1. Reasons for the formation of paint film
(1.)Oil formulation: phenolic antioxidants in lubrication are not easy to produce paint film, while amine antioxidants are easier to produce paint film;
(2.) Oxidative degradation: During the use of oil, high temperature, moisture, metals (copper and iron) and air will accelerate the oxidation, forming carboxylic acid, ester, alcohol and other oxidation products, and further polycondensation to form high molecular polymer. Such as paint film
(3.) Thermal degradation: high temperature gas, steam or high-strength friction will increase the temperature of the metal surface, causing thermal degradation of the base oil and additives, resulting in paint film;
(4.) Static current degradation: The internal friction of molecules and the potential difference between the fluid and the mechanical surface will generate static current. When the electric potential accumulates to an appropriate level, a spark discharge phenomenon will occur, and the temperature can be as high as several hundred or even thousands of degrees Celsius, causing "micro-burning" in the oil micro-area, generating extremely small insoluble matter, which adheres to the metal surface to form a paint film .
2. Detection principle
The paint film tendency index is detected by depositing the particulate matter in the oil insoluble in petroleum ether and having a size> 0.45um on the filter film for colorimetric photometry; the more deposits on the filter film, the darker the color, and the paint film tendency The larger the index.
The particulate matter deposited on the filter membrane is detected by colorimetric photometry; the more deposits on the filter membrane, the darker the color and the greater the paint film tendency index.
3. Testing methods and reports
The method for determining the tendency index of oil paint film includes: ASTM D7843 uses filter photometric analysis (MPC) to detect colored insoluble matter in steam turbine oil in use. The result is reported as the paint film tendency index △E.
The paint film is polar and is easy to deposit and adhere to the metal surface, which affects the heat dissipation of the equipment, causes the oil temperature to rise, oil oxidation and poor lubrication. Monitoring the tendency of paint film can evaluate the risk of paint film produced by oil products, and guide oil product selection and lubrication management.