Transportation Science

Does synthetic oil have any disadvantages?
Answered by Discovery Channel
  • Discovery Channel

    Discovery Channel

  1. Synthetic oil has two disadvantages -- its cost and the possible unintended effects of its engine-cleaning properties. Synthetic oil usually costs six to 10 times as much as mineral oil, but many would argue that the extra cost is justified, since synthetic oil needs changing less frequently.

    Synthetic oil's ability to clean out sludgy deposits from the motor is a real advantage, but if it cleans out deposits that happen to be holding together a weak seal, it can cause an oil leak that could lead to numerous safety problems.

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