Thread: 10W-30 / 10W-40 motor oil comparison
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Old 06-11-2006, 05:08 PM
Roadandguitarman Roadandguitarman is offline
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Question 10W-30 / 10W-40 motor oil comparison
When should you use 10W-30 motor oil and when should you use 10W-40 motor oil, in a passenger vehicle gasoline engine?

Also, would 10W-40 leak less than 10W-30, in the same engine?
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