Is 10W-30 Oil Thicker than 5W-30? Understanding Engine Oil Viscosity

Learn why 10W-30 is thicker than 5W-30 oil and how it affects your engine's performance in this informative Q&A video.

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Yes, 10W-30 is thicker than 5W-30 at lower temperatures, specifically during cold starts. The '10W' and '5W' refer to the oil's viscosity (thickness) in cold weather, with 5W being less viscous than 10W. At operating temperatures, both oils have similar viscosity (the '30'), providing comparable protection to engine components.

FAQs & Answers

  1. What does the 'W' in 10W-30 and 5W-30 mean? The 'W' stands for 'Winter,' indicating the oil's viscosity at lower temperatures.
  2. Which oil should I use in winter, 10W-30 or 5W-30? While 5W-30 is less viscous in cold temperatures, you should choose based on your vehicle's manufacturer recommendations.
  3. Can I mix 10W-30 and 5W-30 oils? It's generally not recommended to mix different viscosities, as it can affect performance.