Why does the car feel sluggish when starting after changing the transmission oil?

1 Answers
StIsabella
07/30/25 6:35am
The reasons why the car feels sluggish when starting after changing the transmission oil: 1. The old oil has deteriorated over time, causing its viscosity to decrease, which reduces the engine's movement resistance. The new oil has higher viscosity than the old oil, so you may feel increased fuel consumption or insufficient power. 2. It could be due to the car engine, where insufficient engine power is the cause. 3. The oil filter may be faulty, clogged, or ineffective, so it is generally recommended to replace the oil filter along with the new oil. 4. The engine lubrication system has not been cleaned for too long, leading to a buildup of deposits. Changing the oil will flush out some impurities, suspending them in the oil and causing the oil filter to clog, resulting in insufficient power. 5. Pay attention to the amount of oil added; adding too much or too little oil can cause insufficient power, which will improve after the second oil change.
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