The same brand of oil can not be mixed Because the type […]
The same brand of oil can not be mixed
Because the types and viscosity levels of the two different brands of oil are the same, but the lubricants produced by different manufacturers, there will be some differences in the chemical composition of the additives. After the blending of the lubricants of different chemical components, the additives may be produced. Chemical reactions reduce the lubrication effect and produce acid-base compounds that exacerbate corrosion of engine parts. Therefore, do not mix different brands of engine oil, even if the viscosity is the same!
New and old engine oil can not be mixed
The old engine oil contains a large amount of oxidizing substances. When the new engine oil and the old engine oil are mixed, the oxidative deterioration rate of the new engine oil will increase, thereby reducing the use effect and the use time of the new engine oil. Therefore, when replacing the lubricating oil, the old lubricating oil in the engine should be exhausted. It is better to flush the system with new lubricating oil and inject new oil.
Oil mixed hazard
1. Exhaust pipe smoke is abnormal
After the oil is mixed, the oil is likely to become thin, so that it is easily brought into the cylinder for combustion, which causes the engine to emit blue smoke.
2. Speed up the formation of oil sludge
The sludge formed in the oil will reduce the heat dissipation effect of the lubricating oil, so that the engine is prone to high temperatures, which may cause the engine to malfunction. Some sludges are present as particulate solids, which accelerates engine wear. Some oil sludge will block the filter and the oil passage, which will easily lead to poor oil return and the engine will not be lubricated. The consequences are very serious.
3. Discoloration of the piston rod or piston ring
The mixed oil may cause a change in its sealing performance, which may cause discoloration or damage to the piston rod or piston ring. Long-term use will cause the piston rod or piston ring to wear seriously, affecting the life of the engine.
4, the piston ring breaks
The viscosity of the blended oil may also change, may become smaller, and may become larger. When the viscosity of the oil becomes larger, the lubricating effect is correspondingly reduced, which is highly likely to cause the piston ring to break.
5, piston and cylinder wear is serious
If the lubricating film of the lubricating oil is destroyed, it will cause severe wear of the piston and the cylinder. After the oil is mixed, the wear resistance of the oil may be greatly changed, which causes the lubricating film formed by the lubricating oil to be extremely unstable, resulting in severe wear of the piston and the cylinder.
Under what circumstances can the oil be mixed?
1. The quality of similar products is basically similar, or high-quality oil mixed with low-quality oil is still used as low-quality oil.
2. It is necessary to adjust the physical and chemical properties of the viscosity of the oil, and use different grades of the same oil to mix with each other.
3, different types of oil, if you know that the two mixed oils are not added with additives, or one of them is no additives, or both oils add additives but do not react with each other, generally can also be mixed, just After mixing, the quality will be reduced for high quality oils.
4, general mineral oil can be mixed, mineral oil and semi-synthesis can be mixed more, the mix between synthetic oil and mineral oil should be cautious.
For those who do not know much about the performance and quality of the oil, it is also possible to do a mixed test on the oil: mix the two oils to be mixed in a 1:1 volume ratio, stir evenly, and observe whether the mixed oil is used after a period of time. There are abnormal phenomena such as odor or sediment, and if there is an abnormality, it cannot be mixed.