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2026. 6. 30. 작업

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If you change your oil with synthetic can you never safely go back to using conventional?

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This is a myth. A lot of old-school mechanics and non-chemistry educated people repeat this false myth. When changing from synthetic to regular oil, there is not anything special that you need to do because synthetic oil will mix directly with regular oil of the same weight (no engine flush is needed). There is some differences between synthetic and regular oil. Synthetic oil has detergents and chemicals to protect the longevity of your engine. ericthecarguy.com has a great YouTube video that talks extensively about the differences of synthetic vs regular oil and answers lots of common questions: [2013-02-04 Regular Oil vs Synthetic Oil -EricTheCarGuy]( http://www.youtube.com/watch?v=3zEBI1QndPo ) A Valvoline scientist publicly stated switching from synthetic oil to regular oil not do anything to your engine. Additionally Valvoline has a public website that states this myth is false https://www.valvoline.com/about-us/faq/synthetic-oil-myths : *MYTH: Once you’ve used synthetic motor oil