Transportation Science

Why is it so important to change your car's oil?
Answered by Discovery Channel
  • Discovery Channel

    Discovery Channel

  1. The oil in your car's engine is most important -- more important than gasoline, water, coolant, transmission or brake fluid. Why? Because the engine oil:

    • Lubricates the different parts of the engine
    • Reduces heat
    • Neutralizes acid
    • Absorbs unwanted dust and water inside the engine

    Over time, the heat of the engine breaks down the oil and the oil filter can't extract any more deposits. If the oil level is low or the oil is too dirty, your engine can be seriously damaged.

    More answers from Discovery Channel »



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