What Causes High Engine Noise and Fuel Consumption?
2 Answers
The main reasons for high fuel consumption in cars include: inadequate driving techniques; engine operating conditions; and lack of maintenance during vehicle usage. Below are specific situations that lead to high fuel consumption: Causes of high fuel consumption in cars: Abnormal tire pressure or switching to larger-sized tires: Underinflated tires affect fuel consumption. When tire pressure is too low, the contact area between the tires and the road increases, leading to greater driving resistance, which naturally results in higher fuel consumption. Long idling without turning off the engine or frequent ignition: During prolonged waits when the vehicle doesn't need to move, it is recommended to turn off the engine. Every time the engine starts, the computer-controlled fuel injection volume is relatively high, so frequent engine starts within a short period will definitely increase fuel consumption. Aggressive acceleration and frequent braking while driving: Unless absolutely necessary, avoid frequent overtaking on the road. Maintaining a steady speed helps reduce fuel consumption. Additionally, maintaining a proper following distance and minimizing unnecessary braking actions can also save fuel. Driving at high speeds in low gears or low speeds in high gears: This situation is more common among new drivers. Often, the vehicle's speed is already high, but the corresponding gear shift hasn't been made, leading to increasingly higher engine RPM and naturally soaring fuel consumption. Another scenario is when the vehicle's speed is too low but the gear remains high, the most obvious signs being engine and body vibration, with the risk of stalling at any moment. Fully open windows in summer or using air conditioning in traffic jams: Turning on the air conditioning in summer increases engine load, leading to higher fuel consumption. Poor route planning, driving on congested roads, and frequent lane changes: It is recommended to plan the route in advance, pay attention to local traffic information and road conditions to avoid congested sections.
Last time my car was making a buzzing noise and consuming a lot of fuel. When I took it to the shop, they found three issues: first, the maintenance was overdue, and the engine oil was as thick as porridge, causing poor lubrication and hard friction; second, the air filter was completely clogged, making the engine struggle to breathe and forcing it to guzzle fuel; third, there was a hole in the middle of the exhaust pipe, making a chugging sound like a tractor. The mechanic said these are common problems—replacing the engine oil and filter immediately quieted it down, and welding the exhaust pipe fixed the issue. Later, I also found that low tire pressure makes the engine work harder. Now I check my tire pressure every month, and my fuel consumption has returned to 7.5L.
