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Motor oil myths are everywhere. In this article, we debunk the top five motor oil myths and provide facts to set the record straight.
Myth 1: Motor Oil Must Be Changed Once It’s Turned Black
Fact: This is not always true. Motor oil darkens due to heat cycles as the engine runs. Additionally, additives in the oil keep contaminants suspended, preventing them from sticking to engine parts, which can make the oil black.
When motor oil turns black, it might mean the additives are working correctly. To know when to change oil, follow your vehicle’s guidelines or use oil analysis for precision. Learn more about why does motor oil turn black, read this post
`Myth 2: You Must Change Oil Every 3,000 Miles`
Fact: Quick-lube chains popularized this myth in the 1970s for customer retention. However, today’s motor oil and engines are much more advanced.
Modern automakers recommend longer oil-change intervals, with many up to 10,000 miles or more, thanks to oil-life monitoring systems. Premium synthetic motor oils, like AMSOIL Synthetics Signature Series Motor Oil, last up to 25,000 miles or one year. Learn more about the 3,000-mile oil-change myth and read up on , Oil Life Monitors – Everything You Need To Know read this post
Myth 3: Can I Mix Synthetic and Conventional Oil?
Fact: Synthetic and conventional motor oils share similar components: base oils and additives. While synthetic oil’s base oils and additives are superior, they are compatible and can be safely mixed. Synthetic-blend motor oil is essentially a mix of synthetic and conventional oil. More answers to, Can I Mix Synthetic and Conventional Oil Read this post
Although safe, we recommend avoiding mixing if possible, as it reduces synthetic oil’s performance. Learn more about mixing synthetic and conventional oil in this post.
Myth 4: Once You Switch to Synthetic Oil, You Can’t Go Back
Fact: Switching from conventional to synthetic oil and back is completely safe and won’t harm your engine. However, after experiencing the improved performance of synthetic motor oil, you might not want to switch back.
Myth 5: Synthetic Oil Causes Engines to Leak Oil
Fact: In older, poorly maintained engines, deposits and varnish can cover worn, cracked seals. Synthetic oil’s improved detergents sometimes remove these deposits, exposing the worn seals underneath.
Occasionally, this leads to leaks. However, it’s the worn seals, not the oil, causing the problem. Quality synthetic oils, like AMSOIL synthetic motor oil, condition seals to prevent leaks. The best solution is to use a high-quality synthetic motor oil before seals deteriorate. So Does Synthetic Oil Cause Leaks? Read this post
Conclusion: Debunking Motor Oil Myths
Understanding the facts behind motor oil myths is essential for proper vehicle maintenance. By debunking these misconceptions, you can make informed decisions about motor oil and protect your engine’s performance and longevity.
Remember to follow your vehicle’s guidelines for oil changes and use high-quality synthetic motor oils for optimal engine protection. Stay informed and share this knowledge with others to help bust these motor oil myths once and for all.
Recap: Top 5 Motor Oil Myths Busted
- Motor Oil Must Be Changed Once It’s Turned Black
- You Must Change Oil Every 3,000 Miles
- You Can’t Mix Synthetic and Conventional Oil
- Once You Switch to Synthetic Oil, You Can’t Go Back
- Synthetic Oil Causes Engines to Leak Oil
Now that these myths are busted, you can confidently make the right choices for your engine and enjoy the benefits of modern motor oil technology. Remember, always follow the manufacturer’s recommendations for your vehicle and consult a professional if you’re unsure about any aspect of motor oil maintenance.


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