How to prevent oil deterioration?

1. Check the engine oil level frequently.

    It should be checked 10 minutes before the diesel generator is started, and the oil level should be checked again after 10 minutes. When replenishing oil, pay attention to cleaning and check for leaks.
2. Always check the quality of the oil.

   When checking the oil level, pay attention to the degree of oil contamination. The oil on the scale cannot change color (unless the oil turns black). When the oil reaches the interval mileage or the oil replacement index, the oil should be replaced in time. It is normal for multi-stage oil to turn black when used. Commonly used detection methods include the oil micro-contrast method, viscosity comparison method, determination method, etc.
3. Change the engine oil regularly.
    Although there is a prescribed oil change period, due to the different degrees of wear and tear of the diesel engine, the oil quality is also different, so different regions, climates, and working conditions have an impact on the oil change period. Changing the oil too early will cause waste, and changing it too late will cause other accidents of the diesel engine.

    When changing the oil, start the diesel engine until its working temperature reaches the normal value (above 80℃); then stop the diesel engine and remove the old oil in the oil pan and thermal filter. If possible, it is best to use a vacuum oil changer when changing the oil, which will suck up the old oil.
    If there are oil stains, the old oil stains should be removed from the lubricating oil passage. When running, add 60%-80% standard capacity clean oil (thin oil or oil containing 20% ​​diesel oil) to the diesel engine, start the diesel engine, idle for 3-5 minutes (do not run at high speed), drain the clean oil, add clean new oil.
4. Select the correct engine oil.
    Oil should be selected as required.
5. Avoid oxidation or deterioration due to high oil temperature.
    Ensure that the water cooling system of the diesel engine works normally and avoids overheating. When the cooling system is abnormal, check and eliminate it in time to ensure that the crankcase ventilation device is in good condition, clean the ventilation pipes and valves regularly; keep the oil temperature at 70-80 ℃, turn on the oil radiator switch in time, and maintain the normal oil level.
6. Do a good job of cleaning.
    Prevent dust and impurities from entering the lubrication system, regularly replace the oil filter, thoroughly clean the lubrication system, regularly replace the lubricating oil, and check the moisture mixing in the lubricating oil;
7. Prevent diesel oil from entering the engine oil.
    In diesel generators, when the fuel injection pump supplies too much fuel, the fuel supply pressure is too low, and the fuel injection atomization is poor, the diesel fuel of the fuel injection pump cannot be fully burned, and part of the diesel fuel will flow into the oil pan along the cylinder wall, causing the oil to change. Thin, reduced viscosity, premature loss of lubrication. For this reason, it is necessary to regularly check or adjust the fuel injection pump and fuel injector, and replace the worn plunger, fuel outlet valve, and coupling in time.
8. Prevent the oil from the cylinder from corroding.​​
    In the combustion chamber, if the matching gap between the piston and the cylinder liner, the valve, and the valve guide is too large, the high temperature and high-pressure exhaust gas in the combustion chamber will be washed into the crankcase, which will accelerate the aging of the oil and form colloid, carbon deposits, and acidic harmful substances. Therefore, it is necessary to replace the above-mentioned excessively worn accessories in time, restore their normal matching clearance, and maintain good sealing.