Lubricating oil quality level
The diesel engine under low-speed, high-load, high-speed and high-load conditions uses CE-grade oil lubrication; the turbocharged diesel engine should use CD-grade and above; and the CF-4 is suitable for high-speed, heavy-duty, long-cycle diesel engines, especially for highway driving. . Effectively prevent wear of piston rings and thickening of engine oil; Use CG-4 diesel engine oil when fuel sulfur content is less than 0.05%; Use bimetal piston engine with higher fuel injection pressure and higher operating temperature; Use CH-4 diesel engine oil; The engine of the exhaust gas recirculation system requires CI-4 diesel engine oil.
Compared with the high-grade and low-grade lubricants, the anti-oxidation capability and clean dispersion ability have been significantly improved. In addition, it has been significantly optimized in terms of wear protection of the valve mechanism, resistance to grease, prevention of filter clogging, loss of lubricating oil, and low-temperature pumpability.
At present, with the promotion of environmental protection in China and the country, the engine manufacturers have introduced high-quality engines (electrically controlled engines). The level of oil use has been correspondingly improved. The CD level has been eliminated, and CF and CH have become mainstream. . According to China's national conditions, such as vehicle overload, poor road conditions, low degree of professionalism of the driver, unstable diesel sulphur content and other undesirable factors, resulting in an overhaul of the engine in advance. Therefore, high quality oil should be used.
select
The engine is divided into gasoline engine and diesel engine according to the type of engine. The engine oil is also divided into gasoline engine oil and diesel engine oil. The API engine S is followed by an English letter and API C followed by an English letter to indicate gasoline engine oil. Engine Oil and Diesel Engine Oil, Rear
The later the letters are sorted, the higher the level is. For example, the API SH level is higher than the API SG level. Therefore, when selecting the engine oil, it must be determined first whether to use gasoline engine oil or diesel engine oil. If the engine oil is represented by the API SH/CD, it means that the engine oil is used as a gasoline engine oil level up to SH, and when used as a diesel engine oil, the level reaches the CD.
According to current (referred to in October 2013), API levels are backwards compatible, API SL quality grade oil can be used for engines that require API SH oil. If possible, use higher grade engine oils as much as possible because it provides better engine protection. In general, the higher the quality of engine oil, the more expensive the price. But can not be reversed.
Select engine oil according to the depot's instructions to determine the use of the corresponding quality level or higher level. The choice of engine oil also takes into account the changing seasons. Because the viscosity of the oil changes with temperature, the viscosity thickens in the winter and the viscosity decreases in the summer. Therefore, in very hot areas, try to select the oil with a slightly higher oil viscosity. In the cold season, use thinner engine oil. But now (as of October 2013) high-quality engine oil can be used in a variety of climate conditions at the same time.
Often heavy or relatively old cars should choose a higher viscosity oil, to avoid the oil viscosity caused by too low oil viscosity, causing unnecessary failure. Available with 50 or 20W/50 oil. Also pay attention to the engine water temperature and oil pressure at any time. If there is any abnormality, you should stop immediately to find out the reason. After troubleshooting, you can continue driving. In addition, the road conditions have little effect on the choice of engine oil, but the road conditions will affect the life of the oil to a large extent. In areas with poor road conditions, the oil change intervals should be shortened.
In addition, the new engine design requirements, due to the use of electronically controlled fuel injection, catalytic converters, EGR, PCV and turbocharging, intercooling and other technologies, the engine operating conditions are more stringent, the choice of high-quality engine oil is also It can prolong engine life, reduce fuel consumption, reduce wear, extend oil change intervals, save oil, save maintenance costs, and increase efficiency. High-grade engine oils can substitute for low-grade, while low-grade engine oils cannot be used for advanced engines.
There are many types of engine oil on the market. It is better not to use two kinds of different brands of engine oil. The additives used in different brands of oil may be different. Mixing may cause deterioration of the oil. If you must mix, you can first do the compatibility test of the two oils, if you can be compatible, but the use of this, the quality of the new oil will drop a lot. Special reminder: Because the oil composition of different grades and different brands has different formulation and composition, if they are not compatible with each other, it will cause reaction, precipitation and the like, which is unfavorable to the engine. Therefore, the engine oil must be strictly, carefully, relatively fixed, do not frequently change the oil of different brands and grades, so as not to damage the engine.
Lubricant market is mixed, generally it is difficult to distinguish the quality of engine oil depending on the appearance. Therefore, when buying oil, care should be taken to select well-known brands of lubricants, as far as possible to the famous brand stores or online shopping malls, according to the API said Oil quality level to distinguish the level of quality, the address of the manufacturer on the packaging of oil products, production date, batch number is complete, clear.
Shantui small Excavators ranging from 5 ton to 16 ton,high reliability traveling mechanism and working device, helping you make plenty of money. Reinforced bucket and high-strength track frame make our excavators capable of working stably for long hours and in harsh environment. Shantui small excavators are designed convenient for repair and the routine maintenance, if you need proven performance, more comfort options excavators, contact us please.
Excavators
Excavators,Road Machinery,Road Roller,Landfill Compactor
Shandong Shantui Construction Machinery Import & Export Co.,Ltd. , http://www.bulldozers.pl