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Why does fuel consumption increase after maintenance?

1 Answers

VanMatthew

07/23/25 11:08pm

Here are the specific reasons for increased fuel consumption after maintenance: 1. Too much engine oil or incorrect oil type: Both can lead to different oil viscosity and increased engine load. To obtain more power, fuel consumption will inevitably increase. 2. Incorrect spark plug type or loose installation: Spark plugs must be of the correct type and should be tightened to the manufacturer's specified torque. Otherwise, gas leakage may occur, with high-temperature and high-pressure gases slowly leaking out, resulting in engine weakness, unstable idling, stalling at high speeds, increased fuel consumption, or even engine failure to start. In severe cases, it can cause spark plug failure or engine damage. 3. No recalibration after throttle cleaning: After throttle cleaning, the throttle opening may increase. If not recalibrated with a diagnostic tool, the engine control unit will still use the pre-cleaning parameters to control air intake and fuel injection, leading to increased fuel consumption.

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