Why Do Japanese Turbocharged Cars Use 92 Octane?

[VanessaRose]

The following is an introduction to why Japanese turbocharged cars use 92 octane: 1. If the manufacturer does not specify, use higher octane gasoline: Some turbocharged cars can use 92 octane as designed by the manufacturer. Judging by the compression ratio, most turbocharged cars perform better with 95 octane. Before finalizing the recommended octane rating in the user manual, manufacturers typically conduct reliability tests by driving hundreds of thousands of kilometers in extreme conditions such as extreme cold, extreme heat, high humidity, high dust, high salt, high acidity, etc. 2. Using lower octane can lead to knocking and vibration issues: If the manufacturer specifies 95 octane but you consistently use 92 octane, the engine is more prone to knocking. It's not like the car will break immediately, but it's somewhat similar to smoking—long-term use is harmful to both the car's health and performance. For a turbocharged car designed for 95 octane, prolonged use of 92 octane will result in reduced power, increased noise, noticeable vibrations, and even potential damage to internal engine components like pistons and connecting rods.