Great Wall Gun Commercial Edition Diesel Automatic Four-wheel Drive Fuel Consumption Becomes Higher after Oil Change.

1, the oil quality of engine oil is not very good, resulting in incomplete combustion of gasoline.

2. If personal driving habits are ruled out, it may be improper ignition.

3. The oxygen sensor is damaged, which causes the fuel injection quantity to be uncorrected, resulting in high fuel consumption.

4. If the viscosity of engine oil is too high and it is added too much, the rotation resistance of crankshaft will also cause high fuel consumption.

5. The throttle position sensor and the air flow meter are faulty, and the signals they input into the computer board are wrong, which leads to the wrong calculation of the fuel injection quantity by the computer board and the high fuel consumption.