1. Observe the color of gasoline: High quality gasoline usually appears light yellow or colorless and transparent. If the color of gasoline is too dark or cloudy, it may contain too many impurities or additives.
2. Smell gasoline odor: High quality gasoline has a unique aromatic aroma, while low-quality gasoline may have a pungent, unpleasant odor, and even a peculiar smell.
3. Testing gasoline performance: The quality of gasoline can be determined by observing the residue after combustion and the performance changes of the engine after use. High quality gasoline burns well with minimal residue, significantly improving engine performance; Poor quality gasoline may lead to problems such as engine carbon buildup and insufficient power.