Can a car that uses 95 octane fuel use 98 octane fuel?

[VanJudah]

It is generally not recommended to use 98 octane fuel in a car that normally uses 95 octane fuel. The additives and chemical compositions of 95 and 98 octane fuels are different. Occasional mixing will not cause significant harm to the car. If different octane fuels are mixed due to an emergency, there is no need to worry. However, long-term mixing can damage the car's ignition system. Below is an introduction to gasoline octane ratings: 1. The octane rating represents the octane number of gasoline. For example, 95 octane gasoline contains about 95% isooctane and approximately 5% heptane. 2. Since isooctane has better anti-knock properties and heptane has poorer anti-knock properties, a higher octane rating indicates better anti-knock performance of the gasoline. By extension, 98 octane gasoline means even better anti-knock performance.