What are the reasons for the sudden increase in fuel consumption of the Tiguan L?

[OLondyn]

The increase in fuel consumption of the Tiguan L may be due to the following reasons: 1. Insufficient tire pressure and tire wear. Low or insufficient tire pressure increases friction between the tires and the ground, leading to greater resistance and higher fuel consumption. Severe tire wear can cause frequent slipping, which also increases fuel consumption. 2. Pay attention to fuel quality and regularly clean carbon deposits. Poor-quality gasoline can lead to more carbon deposits, which roughen the intake pipe walls, affecting air intake and the quality of the air-fuel mixture, causing a sharp rise in fuel consumption. Therefore, fuel quality should not be overlooked, and it is essential to clean carbon deposits every six months. 3. Regularly check the oxygen sensor. This is a ceramic component located on the engine's exhaust pipe, used to detect and control the oxygen-to-fuel ratio. Over time, the electronic fuel injection system's computer may not receive accurate oxygen concentration information from the exhaust pipe, often resulting in a higher concentration of the air-fuel mixture in the engine and increased fuel consumption. Therefore, it is necessary to regularly check the condition of the oxygen sensor, which typically needs replacement after 80,000 to 110,000 kilometers. 4. Driving habits. Everyone's driving habits vary, and poor driving habits can also lead to higher fuel consumption. 5. Driving conditions. Congested driving conditions can also increase fuel consumption because the engine works harder when the vehicle moves from a standstill, leading to higher fuel injection. Additionally, short trips can result in higher fuel consumption as the engine and vehicle may not reach their optimal operating temperature before shutting off. 6. Regularly replace spark plugs. Spark plugs generate high-voltage sparks to ignite the air-fuel mixture. If damaged, they reduce ignition energy, causing uneven combustion of the mixture, slower acceleration, and increased fuel consumption. Standard spark plugs last only 30,000 to 50,000 kilometers, platinum spark plugs last about 50,000 to 80,000 kilometers, and iridium spark plugs can last up to 100,000 kilometers. 7. Vehicle weight. Carrying excessive weight in the vehicle can increase fuel consumption by about 2% compared to normal driving. While this may seem insignificant, it adds up over time. Therefore, modern vehicles are designed with high-strength, lightweight bodies to improve fuel efficiency.