Will it have any impact if I switch from 92 to 95 octane gasoline for my car?
3 Answers
There is no impact if you switch from 92 to 95 octane gasoline once. There are three key points to note when refueling: First, the vehicle models suitable for 92 octane gasoline; Second, the vehicle models suitable for 95 octane gasoline; Third, the consequences of mixing 92 and 95 octane gasoline. 92 and 95 are two common types of gasoline at gas stations, and you should choose the one that is suitable for your car. 92 Octane Gasoline: 92 refers to the octane rating of the gasoline, which measures the anti-knock properties of the gasoline mixture. 92 octane gasoline indicates that the octane value of the gasoline is 92, with an isooctane content of 92 and n-heptane content of 8. This type of gasoline is suitable for vehicles with lower air compression ratios, commonly referred to as non-turbocharged models. 95 Octane Gasoline: 95 also refers to the octane rating of the gasoline. 95 octane gasoline indicates an octane value of 95, with an isooctane content of 95 and n-heptane content of 8. Vehicles with high engine compression ratios should use this high-octane gasoline. For example, turbocharged engine vehicles are more suitable for 95 octane gasoline, commonly referred to as turbocharged (T) models.
I've been driving a taxi for 15 years, and switching from 92 to 95 is really unnecessary spending. 95-octane fuel just has slightly better anti-knock performance. If your car manufacturer recommends 92, the engine simply doesn't need that higher grade. What worries me most is some friends think higher-grade fuel is cleaner and can remove carbon deposits, when in fact fuel tankers deliver mixed grades to gas stations. Last month my neighbor used 95 on the highway and the engine light came on - the mechanic said it was due to fuel mismatch causing incomplete combustion. You're better off saving that money for a good pair of wiper blades, seriously.
As a chemistry graduate and car enthusiast, I must say the main difference between 92 and 95 lies in the proportion of octane number additives. If manufacturers dare to label 92 as suitable, it means the engine compression ratio is designed according to this standard. Using 95 might actually lead to incomplete combustion and more severe carbon deposits at high temperatures. However, during cold starts in winter, 95 does make ignition easier due to its lower distillation temperature. The most crucial point is to avoid mixing with substandard fuel - regular 92 from authorized gas stations is completely sufficient.
