Should Mercedes-Benz use 92 or 95 octane gasoline?

[MilaMarie]

Most Mercedes-Benz vehicles require a minimum of 95 octane gasoline. Below are specific details about refueling: 1. Although 95 octane gasoline offers higher anti-knock performance and power, vehicles designed for lower octane should not blindly opt for higher octane fuel. Higher octane numbers are more suitable for engines with greater compression ratios, while engines in vehicles designed for 92 octane typically have smaller compression ratios. Using 95 octane gasoline in such engines may increase engine knocking. 2. Mixing different octane grades, such as 92 and 95 octane, should be avoided. While occasional mixing may not cause immediate harm, long-term use can potentially affect the engine, leading to issues like carbon buildup and increased fuel consumption.