A car’s oil is like human blood, which is related to the health and lifespan of the entire car. How to identify whether the oil has deteriorated? The editor will tell you four methods to teach you to identify whether the oil has deteriorated.
Hand twisting method
This is the easiest method. Use the thumb and forefinger to twist and grind the old oil repeatedly, and the quality feels good. There should be lubricity, no wear debris, and no friction. If you feel that there is a large friction such as sand between your fingers, and the viscosity is poor, or even astringent, it means that there are iron filings, sludge and impurities in the oil. When will the owner of such oil not change it?
Lighting method
Take out the oil dipstick and raise it at 45 degrees. This is not a selfie, so don??t misunderstand. It is to observe the oil droplets of the oil under the light, so that you can clearly see whether there is wear debris in the oil droplets. In view of the owner’s IQ, let me say one more thing, the oil without abrasive dust is good, but if there is a lot of abrasive dust, it needs to be replaced.
Smell method
I saw it just now, should I smell it? Generally, when the food goes bad, it will give off a sour smell. A common sense landlord should know it? Take out the oil dipstick and smell it close to your nose. If there is a strong sour odor, what does it mean? It means the oil has gone bad! Still one word: change!
Color discrimination method
Here, the landlord needs to prepare a clean white filter test paper. Anything like Jie Rou and Sympathy are all good choices. Then drop a few points of old oil on the paper. After the standby oil leaks, the oil with good quality is powder-free, dry and smooth when touched by hand, and the yellow infiltration band is clear. If it is dark brown, it means there are impurities.