Should Mercedes-Benz use 92 or 95 octane gasoline?
2 Answers
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.
I've been repairing cars for over a decade and have dealt with many Mercedes-Benz fuel-related issues. Mercedes engines all require high-octane gasoline, typically with manuals recommending 95 or 98 octane fuel. Using 92 octane fuel is too risky as it can easily cause knocking, which sounds like a knocking noise but actually damages valves or piston rings. Long-term use of low-octane fuel leads to severe carbon buildup, increased fuel consumption, and higher maintenance costs. I've encountered cases where owners tried to save money by using 92 octane, only to end up spending tens of thousands on engine overhauls. The correct choice is to use 95 octane fuel to ensure safety and engine longevity. If 95 octane is temporarily unavailable, fuel additives can be used as an emergency measure, but it's best to stick with high-octane fuel. Safe driving is more important than saving money—repair costs will make you regret cutting corners.
