How to Distinguish Good and Bad Gasoline?

[VonGavin]

There are several methods to distinguish the quality of gasoline: Smell with your nose: Gasoline with a strong or even pungent smell is of poor quality. Inferior gasoline may have irritating odors such as sharp, eye-stinging, or foul smells. This indicates that the gasoline has excessive sulfur content. The octane number is an agreed value for evaluating gasoline quality, so gasoline with excessively high sulfur content is generally not good. When smelling, do not directly inhale the gasoline; instead, gently wave your hand over the container opening to catch the scent. Observe with your eyes: The color of the gasoline can indicate its quality. Generally, 93# gasoline appears transparent yellow, while 97# gasoline appears emerald green. Qualified gasoline is usually very clear, with no floating matter on the surface, no suspended particles in the middle, and no sediment at the bottom, showing no signs of layering or cloudiness. Conversely, if the gasoline appears cloudy, layered, has suspended particles, or sediment, it indicates potential quality issues. Feel with your hand: Dip your finger into the gasoline and rub it a few times. If your finger feels excessively oily, similar to engine oil, then the gasoline is of poor quality. Alternatively, pour a small amount of gasoline onto your hand. If it evaporates quickly, the gasoline is of good quality.

[AlejandroAnn]

I drive a lot and the most intuitive feelings about gasoline quality are the car's responsiveness and fuel consumption. Good gasoline makes acceleration smooth, the engine quiet with less vibration, and fuel consumption reasonable; inferior gasoline is different—after filling up, the car tends to jerk or even trigger the check engine light, and fuel consumption soars. I prefer big-brand gas stations like Sinopec because their fuel quality is stable, and the additives help clean the engine and reduce carbon buildup. Once, after refueling at a small station, my car had issues, and the mechanic said excessive impurities clogged the fuel injectors. I suggest friends smell the gasoline when refueling—normal fuel has a faint odor, while any strange smell should be avoided. Long-term use of poor-quality fuel can damage the engine's lifespan. Additionally, in hot weather, low-quality gasoline evaporates faster, while good fuel better protects the engine. Now, I always stick to reputable stations, and my car runs much smoother.

[JayceRose]

To make your car more powerful, opt for high-octane gasoline like 95 or 98. This prevents knocking and ensures more complete combustion for quicker acceleration. Low-quality fuel with impurities and dust can clog fuel injectors, leading to sluggish performance. My experience is to refuel at reputable chains like Shell, where their additives clean the system, making the engine more durable. Once, I tried saving money with 92-octane fuel, but the acceleration was jerky—switching back to premium fuel made it smooth again. Poor-quality gasoline with high sulfur content corrodes parts and damages performance over time—don’t overlook this detail. Choose fuel with higher octane ratings; if possible, try performance fuels like V-Power to protect your car and enjoy a thrilling drive. Consistently using high-quality fuel extends your car’s lifespan and maximizes driving pleasure.

[LeEden]

When choosing gasoline from a cost-saving perspective, don't just look at the price. Good gasoline may have a higher unit price but saves fuel and reduces repair costs, making it more economical. Poor-quality fuel contains more impurities, consumes fuel faster, and leads to higher engine repair expenses. I always refuel at reputable large gas stations for better brand assurance. Inferior fuel causes engine vibration and accumulates faults that require early treatment, doubling the costs. I recommend paying attention to special offers at reputable stations, stocking up, and using apps to check reviews to avoid small, unreliable stations. High-quality gasoline reduces carbon deposits, ensuring smooth vehicle operation and lowering maintenance expenses—this is the wisdom of long-term savings.

[DiLucia]

From a technical perspective, the quality of gasoline is determined by its octane rating and purity. High-octane fuels like 95-grade provide stable engine operation by resisting knock; additives such as detergents can reduce carbon deposits and protect the system. Impurities like excessive sulfur affect emissions and may damage the catalytic converter. Based on my research, higher octane ratings generally indicate better quality—avoid old fuel from small stations to prevent deterioration. Long-term use of substandard fuel can lead to injector clogging issues. Choosing certified products from major manufacturers ensures safety and compliance with China VI standards for maximum reliability.