What Happens When You Mix Different Engine Oils? A Detailed Guide

Discover the risks of mixing engine oils and why it's crucial to use the manufacturer's recommended oil type.

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Mixing different engine oils is generally not recommended. While mixing oils of the same viscosity and API standards might not cause immediate issues, it can dilute the performance attributes tailored to your engine's needs. This could lead to lubrication inefficiency and potential engine damage. It's best to use the oil type and grade specified by your vehicle's manufacturer to ensure optimal performance and longevity.

FAQs & Answers

  1. Can mixing different viscosity engine oils harm my engine? Yes, mixing different viscosity engine oils can lead to lubrication inefficiency and potential engine damage due to the dilution of performance attributes.
  2. What should I do if I accidentally mix engine oils? If you accidentally mix engine oils, it's wise to change the oil as soon as possible, using the type and grade recommended by your vehicle's manufacturer.
  3. Are synthetic and conventional oils compatible? While synthetic and conventional oils can technically be mixed, it's not recommended as it may compromise the benefits of synthetic oil and impact engine performance.
  4. How often should I change my engine oil? You should change your engine oil as per your vehicle manufacturer's recommendations, typically every 5,000 to 7,500 miles, depending on the oil type and driving conditions.