When was 93 gasoline changed to 92 gasoline?
2 Answers
93 gasoline was changed to 92 gasoline in 2011. The following is relevant information: 1. Gasoline grade: It is the ratio of the actual gasoline's anti-knock performance to that of standard gasoline. The higher the grade, the stronger the anti-knock performance. Standard gasoline is composed of isooctane and n-heptane. It is not the case that the higher the grade, the better. The gasoline grade should be reasonably selected according to the engine compression ratio. 2. Additives contained: The additives in gasoline include anti-knock additives, active additives, catalytic combustion promoters, flame retardant regulators, and cleaning additives, etc. The proportions of these additives vary depending on the fuel grade. The main component of anti-knock additives is octane, and flame retardant regulators also have anti-knock functions. Therefore, a lower grade does not necessarily mean a lower anti-knock octane value, as the flame retardant regulators also play a role.
I've been driving for over a decade and clearly remember the switch from 93-octane to 92-octane gasoline on January 1, 2017, when China implemented the National V emission standards. At that time, gas stations began updating their grade signs, which caught many drivers by surprise—lots of car owners were confused about which fuel to use. From my experience, the new grade actually represents improved gasoline quality with more reasonable anti-knock indexes, helping to reduce exhaust pollution. During the adaptation period, I reminded myself not to worry too much about vehicle performance because 92-octane is better suited for modern engines. If you accidentally use the wrong fuel or get an engine warning light, visit a service station immediately for inspection. Overall, this change was made to protect the environment and make driving more eco-friendly and safer.
