Is it okay to use 92 gasoline regularly and occasionally switch to 98?

[KateLee]

If a car uses 92 gasoline regularly and occasionally switches to 98 gasoline, there is no immediate impact, but long-term use may have adverse effects. Normally, the gasoline octane rating for a car should follow the instructions provided in the vehicle's manual or the manufacturer's recommendation, which can often be found on the inside of the fuel tank cap. 98-octane gasoline: 98-octane gasoline currently has the highest octane rating in China. While it offers better anti-knock performance and higher power output, vehicles designed for lower-octane fuel should not arbitrarily use higher-octane gasoline. Higher octane ratings are more suitable for engines with larger compression ratios, whereas engines designed for 92-octane gasoline typically have smaller compression ratios. Using 98-octane gasoline in such engines may increase the risk of engine knocking. Do not mix gasoline types: Different octane ratings of gasoline should not be mixed, such as blending 92 and 98-octane gasoline. In special circumstances, occasional mixing once or twice may not cause issues, but long-term use could negatively affect the engine, potentially leading to problems like carbon buildup and increased fuel consumption.