What does the fuel grade 929598 mean for experienced drivers?
2 Answers
In fact, these numbers represent the octane rating of gasoline. The higher the number, the higher the octane rating, indicating better anti-knock performance of the gasoline. Here is some information about gasoline: 1. Introduction: Gasoline is a volatile and flammable hydrocarbon mixture liquid obtained from petroleum through distillation and cracking, used as fuel. It appears as a transparent liquid, is flammable, with a distillation range of 30°C to 220°C, and mainly consists of C5~C12 aliphatic hydrocarbons and naphthenes, along with a certain amount of aromatic hydrocarbons. 2. Classification: Gasoline has a high octane rating (anti-knock combustion performance) and is divided into grades such as 89, 90, 92, 93, 95, 97, and 98 based on the octane rating. Starting from January 2012, the gasoline grades 90, 93, and 97 were revised to 89, 92, and 95.
Back when I worked as a mechanic, I often heard drivers talking about 92, 95, and 98—essentially, these numbers refer to gasoline octane ratings. The higher the number, the better the knock resistance. You've got to treat your car like raising a child—turbocharged or high-compression engines need 95 or 98, otherwise, engine knocking will damage the machine like a persistent cough. Naturally aspirated engines are fine with 92; forcing 98 into them leads to incomplete combustion, more carbon deposits, and wasted money. The safest approach is to check the back of the fuel filler cap—the manufacturer has already marked the recommended octane rating there. Don’t fall for myths like ‘higher octane means cleaner fuel’—octane rating has nothing to do with fuel cleanliness.
