What are the solutions for high fuel consumption in Peugeot 508?

[StPaislee]

You can reduce fuel consumption by cleaning engine carbon deposits, checking the oxygen sensor, regularly replacing the three filters, and inspecting the electronic control unit. The combined fuel consumption of the Peugeot 508 is 6.0-6.1L/100km. There are currently 5 models of the Peugeot 508 on sale: the Pioneer Edition and the Drive Fun Edition, with a combined fuel consumption of 6.0L/100km. The Sport Edition, Passion Edition, and Drive Control Edition have a combined fuel consumption of 6.1L/100km. The above figures are the NEDC combined fuel consumption, which is the fuel consumption data measured under the NEDC test procedure. The actual fuel consumption is higher than this value, ranging from 8.0-8.8L/100km. Methods to reduce fuel consumption: Clean engine carbon deposits: Excessive engine carbon deposits are a significant cause, mainly due to the use of unsuitable fuel. It is recommended to add a certain amount of cleaning agent when refueling. If the effect is not obvious, it indicates that there is a considerable amount of carbon deposits in the engine. In this case, the car must be taken to a 4S shop for professional technicians to clean the carbon deposits inside the engine. Check the oxygen sensor: As an internal control unit of the car, the oxygen sensor mainly monitors the fuel-air ratio of the engine. Once it is damaged, it will cause an imbalance in the fuel-air ratio, leading to a sudden increase in fuel consumption. If the oxygen sensor is damaged, the exhaust pipe will emit darker-colored exhaust gas while driving, and the oxygen sensor should be replaced at this time. Regularly replace the three filters: During the use of the vehicle, the oil filter, air filter, and fuel filter must be replaced regularly. If they are not replaced for a long time, they will become dirty and send incorrect information to the engine control unit, resulting in incomplete fuel combustion and increased engine carbon deposits. Check the electronic control unit: Although the engine's electronic control unit is highly reliable, in vehicles that have been used for a long time, various faults may inevitably occur.