Should the Mercedes-Benz C200L use 92 or 95 octane gasoline?
2 Answers
The Mercedes-Benz C200L should use 95 octane gasoline. The gasoline octane rating represents the ratio of the actual gasoline's anti-knock performance to that of standard gasoline. The higher the octane number, the stronger the anti-knock performance. 92 octane gasoline: 92 octane gasoline contains 92% isooctane and 8% n-heptane. Standard gasoline is composed of isooctane and n-heptane. Higher octane numbers are not necessarily better; the appropriate gasoline grade should be selected based on the engine's compression ratio. 95 octane gasoline: 95 octane gasoline contains 95% isooctane and 5% n-heptane. When the engine's cylinders perform piston movements, gasoline and air mix and compress inside the cylinder. If the pressure is too high, knocking can occur.
I usually enjoy studying the mechanical structures of cars. The engine of a Mercedes-Benz C200L is quite sophisticated and was optimized for 95-octane or higher gasoline during its design. The 92-octane fuel has too low an octane rating, and using it can easily lead to engine knocking, which sounds like a tractor clattering. Over time, this can damage the cylinders or spark plugs, and the repair costs would end up being much higher. The manual definitely recommends 95-octane gasoline—don’t try to save a bit on fuel costs. Using the right fuel also makes daily driving smoother and quieter, and it extends the engine’s lifespan. I suggest you consult the service center for professional advice. After all, it’s your car, and taking better care of it will be more cost-effective in the long run. Spending money on unnecessary repairs is worse than just using better fuel.
