What grade of gasoline should the Roewe 550 use?
2 Answers
Roewe 550 should use 92-octane gasoline. Here are the specific details: Introduction: The Roewe 550 requires 92-octane gasoline. 92-octane gasoline consists of approximately 92% isooctane and 8% n-heptane. Since isooctane has better anti-knock properties and n-heptane has poorer anti-knock properties, a higher octane rating indicates better anti-knock performance of the gasoline. Important Notes: The choice of gasoline grade should be based on the engine's compression ratio. Blindly using higher-octane fuel will not utilize its superior anti-knock advantages and will result in unnecessary expenses. Additionally, using gasoline that does not match the compression ratio may cause premature detonation of the fuel mixture during piston compression, affecting the vehicle's performance.
I am the owner of a Roewe 550 and have been driving it for several years, always using 95-octane gasoline because this car has a turbocharged engine. The manual recommends 95-octane fuel to prevent knocking and noise. From my personal experience, when using 92-octane, the acceleration feels jerky, and the engine noise is unpleasant. Long-term use of 95-octane fuel makes the car run smoothly and saves fuel. During maintenance, the mechanic also mentioned that it can extend the engine's lifespan. I usually fill up with Sinopec's 95-octane fuel for its stable quality, and I make it a habit to top up before long trips to ensure no issues on the road. If I occasionally use 92-octane to save money, it's only for emergencies, but I don’t recommend regular use since engine repairs are more expensive. Choosing 95-octane is about peace of mind—it makes driving more enjoyable, and I feel the money is well spent.
