Is Thicker Oil Better for High Mileage Engines? Expert Advice

Discover if using thicker oil benefits high mileage engines and how it affects lubrication and engine performance.

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Yes, using thicker oil can be beneficial for high mileage engines. Thicker oil can improve seal condition, minimize leaks, and provide better lubrication for worn engine components. However, it's essential to consult your vehicle's manual or a professional before switching, as too thick an oil can lead to inadequate flow at startup and reduced engine performance.

FAQs & Answers

  1. Why use thicker oil in a high mileage engine? Thicker oil can help improve seal condition, reduce leaks, and provide better lubrication for worn components in high mileage engines.
  2. Can using oil that is too thick harm my engine? Yes, oil that is too thick may lead to poor flow at startup, decreasing lubrication and potentially harming engine performance.
  3. Should I consult my vehicle manual before changing oil viscosity? Absolutely, always consult your vehicle’s manual or a professional mechanic before switching to a thicker oil to ensure it suits your engine’s needs.

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