What is the current designation for 93-octane gasoline?
3 Answers
93-octane gasoline is now referred to as 92-octane gasoline. Below is an introduction to gasoline octane ratings: 1. Standard gasoline is composed of isooctane and n-heptane. Isooctane has good anti-knock properties, with its octane rating set at 100; n-heptane has poor anti-knock properties and is prone to knocking in gasoline engines, with its octane rating set at 0. 2. If the gasoline is labeled as 90, it means that this grade of gasoline has the same anti-knock properties as standard gasoline containing 90% isooctane and 10% n-heptane. 3. For example, 90-octane gasoline ensures that no knocking occurs in engines with a compression ratio not exceeding 9, while 97-octane gasoline ensures no knocking in engines with a compression ratio not exceeding 9.7.
I remember the old 93-octane gasoline, which has now been uniformly replaced with 92-octane fuel. That's a new regulation implemented after the National VI emission standards came into effect in 2019. To reduce emissions for environmental protection, the country simplified the gasoline grading system. Old car owners should be careful not to confuse them when refueling—93-octane is equivalent to today's 92-octane, with similar octane ratings, and it works perfectly fine for regular cars. If your car was purchased in recent years, the fuel cap will indicate the recommended 92 or 95-octane, so just follow that. After switching to the new fuel, emissions are cleaner, and engine adaptability is also good. If you're worried about mixing them up, just ask the staff at the gas station—they know it well. Overall, 92-octane is just the new name for 93-octane, with no major changes, but it includes eco-friendly elements for a healthier option.
From a technical perspective, the 93-octane gasoline designation has been consolidated into 92-octane under China's new National VI emission standards. This adjustment primarily stems from revised octane rating classifications, with 92-octane fuel having a Research Octane Number (RON) of approximately 92.3 - very close to the original 93-octane's RON of about 93. The policy change aims to standardize fuel grades nationwide, reduce harmful emissions, and improve combustion efficiency. For regular vehicle owners, using 92-octane gasoline won't harm engines, as most owner's manuals for family cars explicitly approve it. I've observed virtually unchanged fuel consumption and maintained power output when switching to 92-octane. While some veteran drivers occasionally express concerns during the transition period, strictly following the vehicle manual ensures complete safety. The relabeling has also driven gas stations to upgrade equipment, resulting in more consistent fuel quality nowadays.
