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

[StLucia]

A car that uses 98 octane fuel should not use 95 octane, and different octane ratings of gasoline should not be mixed. More information about 98 and 95 octane gasoline is as follows: 1. Gasolines with different octane ratings have different octane values. The higher the octane rating, the higher the octane value, and the better the anti-knock performance of the gasoline. 2. 98 octane gasoline is gasoline whose octane value is equal to a mixture of 98% isooctane and 2% n-heptane. The advantages of 98 octane gasoline are "two highs and two lows," meaning higher anti-knock performance and power output, while the harmful substances and tailpipe pollution are lower. 3. 95 octane gasoline contains 95% isooctane and 3% n-heptane. High-compression engines should use high-octane gasoline. If low-octane gasoline is used in a high-compression engine, it can cause abnormal combustion, leading to knocking, increased fuel consumption, and reduced driving performance.