What are the reasons for the high fuel consumption of the Haima M5?
2 Answers
The reasons for high fuel consumption include: 1. Dirty engine oil and air filter: If the vehicle has not been maintained for a long time, dirty engine oil and air filter can also lead to increased fuel consumption. Dirty engine oil causes poor lubrication, increasing resistance in various moving parts of the engine, which requires more energy to overcome, resulting in higher fuel consumption. A dirty air filter restricts airflow, requiring more energy for intake and leading to incomplete combustion, where some gasoline is not fully burned and is expelled, thus requiring more gasoline to cover the same distance. 2. Spark plugs need replacement: Spark plugs are often overlooked, with some people not replacing them even after 100,000 kilometers. Although spark plugs can still function beyond their lifespan, insufficient ignition energy can cause delayed ignition, missing the optimal timing. For example, gasoline should ideally ignite when the piston is near top dead center, but insufficient ignition energy may delay ignition until the piston starts moving downward, leading to power loss and wasted energy. This also results in incomplete combustion, further increasing fuel consumption. 3. Low tire pressure: Insufficient tire pressure increases the contact area between the tires and the road, raising friction and rolling resistance, which increases fuel consumption. Low tire pressure also shortens tire lifespan and increases the risk of blowouts on highways. Therefore, tire pressure should be checked regularly, at least every two months. If the vehicle has a tire pressure monitoring system, it can be checked directly; otherwise, a tire pressure gauge should be used to measure each tire manually. 4. Incorrect sensor data: For example, coolant temperature sensors and oxygen sensors. If these sensors are not completely faulty but provide inaccurate data, they may not trigger a warning light, making it difficult to detect without checking the data stream with a diagnostic tool. For instance, a coolant temperature sensor showing a lower temperature or an oxygen sensor indicating excessive oxygen content can cause the engine control unit to inject more fuel, leading to incomplete combustion and higher fuel consumption. 5. Excessive carbon buildup: Carbon deposits can accumulate in the throttle body, fuel injectors, intake manifold, and piston tops. Excessive carbon deposits in any of these areas can cause incomplete combustion, leading to increased fuel consumption.
I found that the high fuel consumption of the Haima M5 may be caused by several reasons. For example, poor driving habits—I used to frequently accelerate and brake abruptly when driving this car, especially in congested urban areas, where fuel consumption would spike as speed increased. There are also vehicle maintenance issues; a clogged air filter can prevent the engine from getting enough air, leading to incomplete combustion, and old spark plugs can also increase fuel consumption. Insufficient tire pressure increases resistance, and after I started checking tire pressure regularly, fuel consumption decreased somewhat. Carrying too much weight in the car or excessive use of the air conditioning can also increase fuel consumption, especially noticeable in summer. Personally, I feel that as the car ages, parts wear out—for example, excessive carbon buildup in the engine—so I recommend servicing it every six months and cleaning the fuel injectors. Additionally, poor road conditions with frequent stops and starts can worsen fuel efficiency, so choosing smoother routes is better. Overall, paying attention to small details can save a lot of money.
