Can a Car Designed for 92 Octane Gasoline Use 95 Octane?

[SanGrant]

A car designed for 92 octane gasoline can use 95 octane, but it is not recommended. In unavoidable situations, using 95 octane once or twice is generally not a major issue. However, prolonged use can damage the engine's ignition system, including spark plugs, and negatively impact the engine's lifespan. Differences Between 95 Octane and 92 Octane Gasoline: 95 octane gasoline consists of 5% n-heptane and 95% isooctane, while 92 octane gasoline is composed of 8% n-heptane and 92% isooctane. Higher octane gasoline has greater anti-knock properties but is also more expensive. Due to its higher octane rating, 95 octane gasoline burns more easily and delivers more power compared to 92 octane. 95 and 92 Octane Gasoline Should Not Be Mixed Long-Term: Occasionally mixing the two in emergencies usually doesn't cause significant problems, but prolonged use can lead to engine knocking, insufficient power, and other issues. Similarly, a car designed for 95 octane gasoline using 92 octane occasionally won't have major problems, but long-term use increases the frequency of knocking and accelerates engine wear.