What are the reasons for the particularly high fuel consumption of the Roewe W5 after several years of driving?
3 Answers
Roewe W5 has particularly high fuel consumption after several years of driving due to its heavy body weight, which leads to increased fuel consumption. Below is relevant information about fuel consumption: Fuel consumption per 100 kilometers: This refers to the amount of fuel consumed by a vehicle traveling 100 kilometers on the road at a certain speed. It is a theoretical indicator for the vehicle. Manufacturers measure this value under objective conditions using a dynamometer installed on the vehicle's chassis, converting it into speed parameters, then specifying the speed to calculate the theoretical experimental fuel consumption per 100 kilometers. Road condition fuel consumption: Road condition fuel consumption is a fuel indicator calculated based on repeated tests where the vehicle travels at specified speeds and times on designated roads, also known as multi-condition road cycle fuel consumption.
I think the sudden increase in fuel consumption after driving the Roewe W5 for several years is mostly due to engine carbon buildup. Over time, carbon deposits accumulate inside the engine, making it work less efficiently and consume more fuel. My car is the same—it used to be very fuel-efficient on long trips, but now it burns more fuel after just half a day of driving. Check the spark plugs and ignition coils; if they're worn out, ignition delays can cause incomplete fuel combustion, leading to waste. Also, a clogged air filter restricts airflow, naturally causing fuel consumption to spike. Avoid aggressive driving—sudden acceleration and hard braking both increase fuel consumption. Regular engine cleaning and oil changes can help restore performance significantly. Low tire pressure can also drag down fuel efficiency, so don’t forget to check it. In short, consistent maintenance is key—just like people, cars become more prone to issues as they age if neglected.
From a car repair perspective, high fuel consumption in the Roewe W5 is quite common after a few years, and I've encountered many owners with this issue. The main problems are carbon buildup in the fuel system, clogged fuel injectors causing uneven fuel spray, and uncoordinated engine operation. Aging oxygen sensors are also troublesome—inaccurate monitoring leads to excessive fuel delivery. A faulty catalytic converter in the exhaust pipe can also contribute. Poor maintenance habits, such as not changing the oil on time, result in poor lubrication, faster engine wear, and increased fuel consumption. I recommend checking these areas first; spending a little on repairs is better than enduring the problem. In terms of driving, frequent stops and starts in city traffic also hurt fuel efficiency. Upgrading to better spark plugs can make a noticeable difference. Schedule regular maintenance—don't wait for major components to fail. Also, use either 92 or 95 octane fuel and avoid mixing in low-quality gasoline.
