How to Check Gasoline Quality?
2 Answers
Methods for testing gasoline quality are as follows: 1. Color identification: If the color darkens, it indicates the gasoline has been stored for too long and undergone reactions; 2. Smell test: Gasoline has a faint aromatic odor due to the presence of aromatic compounds—lightly sniff the gasoline to check its smell; 3. Actual measurement: Measure the octane number and density of the gasoline. Theoretically, the higher the octane number, the more resistant it is to burning. Additionally, gasoline density is best between 0.735 and 0.745. Currently, gas stations generally supply National IV gasoline with octane numbers typically between 93% and 94%, as well as National V 92-octane gasoline with octane numbers usually between 92% and 93%, and higher-grade 97 and 98-octane gasoline.
To check gasoline quality, I start by visually inspecting the fuel to see if the color is clear and transparent, free of impurities or sediment. Then I smell it—pure gasoline has a faint oil scent, without any strange odors, sourness, or chemical smells. If the color is cloudy or the smell is odd, I definitely avoid using it. When refueling, I choose reputable, large-brand gas stations to avoid small stations with questionable fuel tanks. I often check the cleanliness of the fuel nozzle before filling up to prevent water or dust contamination. Low-quality gasoline can clog fuel lines, damage the engine, and increase fuel consumption. I recommend regular vehicle maintenance, including cleaning the fuel tank. If in doubt, you can place a small drop of gasoline on paper and ignite it for testing—the flame should burn evenly with a blue color. If it produces black smoke or crackles, the quality is poor. Long-term use of substandard fuel accelerates part wear and affects driving safety. So, I’m cautious every time I refuel to protect my car and ensure peace of mind.
