Why Does Fuel Consumption Increase After Maintenance?

[DiSamuel]

The reasons for increased fuel consumption after maintenance include mismatched spark plug models, among others. Below are the specific reasons for increased fuel consumption after maintenance: 1. Too much or incorrect type of engine oil: Excessive engine oil causes intense agitation among engine components during operation, which not only increases internal power loss but also leads to more oil splashing onto the cylinder walls, resulting in oil burning and exhaust issues. Additionally, it creates unnecessary resistance to the crankshaft's rotation, affecting power output and consequently increasing fuel consumption. 2. Mismatched spark plug models: Spark plugs have specific models, with the heat range parameter being particularly important—it can be simply understood as the spark plug's heat dissipation capability. If the spark plugs replaced during maintenance are unsuitable for the vehicle's engine, it will inevitably affect engine performance, increase fuel consumption, and in severe cases, damage the engine. 3. Throttle body not recalibrated: If not recalibrated, the engine control unit will continue to use the pre-cleaning throttle opening parameters to control air intake and fuel injection, leading to increased fuel consumption.