What are the effects of inferior gasoline on engines?

The impact of inferior gasoline on the engine:
1. Impact on the fuel supply system
The impurities in low-quality gasoline exceed the standard. When the engine is running, low-quality gasoline fills the filter screens, gasoline filters, and fuel injectors of various oil pumps in the fuel supply system, which have small holes or have a filtering effect. However, impurities in low-quality gasoline can easily block various filter screens and small holes in the oil ducts, causing poor fuel supply and reduced engine function.
2. Impact on valve (of a four-stroke engine)
The high content of resin in the fuel can cause the valve to not close properly due to the accumulation of resin in the valve guide, leading to the phenomenon of a plug on the valve and causing serious damage to the engine.
3. Failure of oxygen sensor and three-way catalytic converter (of the vehicle)
Gasoline containing impurities cannot be fully burned, and causes poor exhaust, substandard exhaust, unstable engine operation, weak acceleration, poor overall economic performance, and fuel consumption.
4. Carbon deposition
Impurities in low-quality gasoline generally exist in the form of colloids in gasoline. Even if they pass through the filtration device, they will form deposits in the intake valve, intake duct, and cylinder, forming hard carbon deposits over time. It has an adsorption effect on gasoline, causing mixed gases and affecting engine operation. What is more serious is that the gum sticks to the valve, causing the piston to collide with the valve that has not returned when working upwards, causing abnormal engine noise and causing engine damage.