What do 92 and 95 mean?
2 Answers
92 gasoline refers to standard gasoline containing 92% isooctane and 8% n-heptane; 95 gasoline refers to standard gasoline containing 95% isooctane and 5% n-heptane. 95 gasoline has better anti-knock performance than 92 gasoline. The following is an introduction to gasoline grades: 1. Definition of gasoline grades: It represents the octane number of gasoline. For example, 98 gasoline contains about 98% isooctane and about 2% n-heptane. 2. Anti-knock performance of gasoline: Since isooctane has better anti-knock performance and n-heptane has poorer anti-knock performance, the higher the grade, the higher the octane number, indicating better anti-knock performance of the gasoline.
I've been driving our family's decade-old car. The numbers 92 and 95 on gasoline refer to the octane rating indicating anti-knock performance - the higher the number, the less likely the engine will make pinging noises. 92 octane suits regular compression ratio engines, like my economy car - just pump it in, saving money while being practical. 95 octane is for premium vehicles; turbocharged engines with high compression ratios require it, otherwise engine damage and reduced lifespan may occur. My mechanic friend mentioned that using the wrong grade occasionally won't hurt, but long-term misuse causes serious issues. Always check the recommended fuel grade marked on the fuel filler cap - never skip this step. Price-wise, 95 octane costs a few cents more per liter but offers better engine protection. Current environmental regulations encourage higher-octane fuels for cleaner emissions. In short, different cars need different grades - don't cut corners to save pennies only to spend dollars on repairs later. This approach ensures both safety and cost-effectiveness.
