What are the reasons for a sudden increase in fuel consumption?

[DiArabella]

There are several reasons that may cause a sudden increase in fuel consumption: 1. The use of inappropriate fuel may be a factor. 2. Aging spark plugs or excessive carbon buildup can directly reduce ignition efficiency. 3. Issues in the fuel system, such as a dirty or clogged fuel filter or a faulty fuel injector, can also lead to higher fuel consumption. If you notice a sudden increase in fuel consumption, it is best to have your vehicle thoroughly inspected at a repair shop. Additional information: Recommended spark plug replacement intervals are as follows: 1. For nickel alloy center electrodes: If the spark plug's center electrode is made of nickel alloy, it is recommended to replace it every 20,000 to 30,000 kilometers. 2. For platinum or iridium center and side electrodes: If both the center and side electrodes of the spark plug are made of platinum or iridium, it is recommended to replace them every 80,000 kilometers, and clean carbon deposits from the spark plugs as needed. 3. For platinum center electrodes only: If only the center electrode of the spark plug is made of platinum or iridium, it is recommended to replace it every 40,000 to 60,000 kilometers.