You’re A Mechanic If You Can Pass This Essential Car Maintenance Quiz

Noor Muhammad|Auto|5 Apr 2023

Which of the following engine oil grades would be great for an old car?

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A man changing the oil on a vehicle at Jiffy Lube.
Retry Correct Incorrect As a general rule of thumb, the bigger the number on the grade of engine oil, the thicker it is. Older engines need thicker oil as the clearances between piston rings and cylinders have increased due to wear.
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Jeffrey Greenberg/Universal Images Group via Getty Images
Jeffrey Greenberg/Universal Images Group via Getty Images

Which of the following engine oil grades would be great for an old car?

  • 10W-30
  • 5W-30
  • 20W-50
  • 0W-20
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