Should the Roewe RX5 use 92 or 95 octane gasoline?
2 Answers
The Roewe RX5 can use either 92 or 95 octane gasoline, but it is necessary to use automotive gasoline that meets the national mandatory standards and the recommended octane rating. Hazards: Using gasoline with a lower octane rating can cause severe damage to the engine and catalytic converter, reduce engine power and torque, and increase fuel consumption. If lower octane gasoline is used, knocking noises from the engine may be heard, and it is necessary to switch to the recommended octane rating or higher. Precautions: If severe knocking noises are still heard after using the recommended octane rating or higher, it is necessary to immediately visit an authorized after-sales service center for inspection. Using gasoline with a higher octane rating than required by the engine is permissible, but it does not provide significant advantages in terms of engine output power or fuel consumption.
I've specialized in engine fuel systems for many years. Looking at the Roewe RX5, this vehicle comes standard with a turbocharged engine. The manufacturer's manual typically recommends using 95-octane gasoline because its higher octane rating better prevents engine knocking. Knocking sounds scary - it refers to premature combustion of gasoline in the cylinders, resembling piston slap. In mild cases it affects power output, while severe cases can damage pistons or valves. Although the RX5 engine is designed to be compatible with 92-octane fuel, in actual driving situations like climbing hills or highway overtaking, 95-octane gasoline provides faster response, more linear throttle control, and slightly better fuel economy. Through my frequent vehicle inspections for friends, I've noticed those using 92-octane long-term tend to have more prominent carbon deposit issues, which are troublesome to clean. I recommend new owners prioritize 95-octane - don't compromise the engine to save a few bucks, as this is crucial for long-term performance.
