How to judge the quality of oil products in gas stations?

Smell: If gasoline has a disgusting smell or an unusually pungent smell, it may be inferior. The shelf life of normal gasoline is 3 months, so if you want to refuel, you have to go to a regular gas station with good brand business.

Look at the tail gas: after we use the blended oil, this tail gas is different from the normal tail gas. It may be white or black, because the inferior oil is not completely burned.

Matters needing attention in oil use

It should be noted that when selecting the use grade of engine oil, the engine with lower requirements can use high-grade engine oil, but it is not economical to degrade it too much. Do not add low-grade engine oil to the demanding engine, otherwise it will cause early wear and damage of the engine.

Multi-grade oil has good viscosity-temperature performance, can be used in engines for a long time, saves fuel, is universal in all seasons and is easy to manage. When multi-grade oil is used, the oil color is easy to turn black, and the oil pressure is lower than that of ordinary oil. These are normal phenomena and do not affect the use.