What are the reasons for the high fuel consumption of the Roewe W5?
3 Answers
The reasons for high fuel consumption include: excessively high engine idle speed, failure of the oxygen sensor or air-fuel ratio sensor, and leakage of the cold start injector leading to an overly rich mixture. Methods to reduce fuel consumption are as follows: Properly adjust tire inflation pressure: Maintaining the correct tire pressure can reduce rolling resistance and lower fuel consumption. Additionally, a tire pressure slightly higher than the specified value by +0.2bar can also save fuel. Moderate use of in-car auxiliary electrical equipment: Using certain electrical equipment can significantly increase fuel consumption, such as the air conditioning system's cooling function. If the heating purpose has been achieved, the seat heater should be turned off promptly. The rear window heater should also be turned off when there is no fog or ice on the window. Proper use of gears: Match the gear to the appropriate speed, avoiding high speed with low gear or low speed with high gear. Shift gears in advance, ensuring the speed corresponds to the gear, and avoid driving at high speed with low gear or low speed with high gear.
Over the years of driving the Roewe W5, I've noticed that high fuel consumption is quite common. From my own observations, it mainly comes down to driving habits, like frequently slamming on the brakes or accelerating aggressively, which forces the engine to work harder. Poor maintenance, such as a clogged air filter or worn-out spark plugs, can also lead to increased fuel injection. Additionally, the car itself is quite heavy, and if it's often fully loaded or has a large roof box, fuel consumption naturally spikes. I recommend checking tire pressure and oil condition every 5,000 kilometers, developing a habit of driving at a steady speed, and turning off the air conditioning's external circulation when driving in the city to save some fuel.
Last time my friend drove a Roewe W5 and complained about shockingly high fuel consumption. I spent a long time helping him diagnose the issue. Mechanically, the most likely causes are carbon buildup clogging the fuel injectors or a faulty oxygen sensor leading to incomplete combustion. Electrical issues are also common - for example, a malfunctioning thermostat keeping the engine running at low temperatures will definitely increase fuel consumption. A slipping clutch will waste even more fuel, and if the check engine light stays on, you should immediately read the trouble codes. I recommend regular throttle body cleaning, checking the fuel pressure regulator, and replacing spark plugs every 50,000 km - these small maintenance items can effectively control fuel consumption.
