5W-40 vs 10W-40: Which Motor Oil is Best for Your Vehicle?

Discover whether 5W-40 or 10W-40 motor oil is best for your vehicle based on climate and cold start performance.

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5W-40 is generally better for cold starts as it flows more easily in lower temperatures. 10W-40 is suitable for warmer climates as it provides good protection at high temperatures. Consider your vehicle’s requirements and local climate when choosing between the two.

FAQs & Answers

  1. What does the 'W' in motor oil viscosity ratings mean? The 'W' stands for winter, indicating the oil's performance in cold temperatures.
  2. Can I mix 5W-40 and 10W-40 oil? Yes, you can mix them, but it is usually recommended to use just one type for optimal performance.
  3. What is the best oil for extremely cold weather? 5W-40 is generally better for cold weather as it has better flow at lower temperatures.
  4. Is 10W-40 better for high temperatures? Yes, 10W-40 provides good protection and performance in warmer climates.

Watch More

For more insights on choosing the right oil for your vehicle, check out our articles on engine maintenance and tips for selecting the best oils for different climates.

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