The real risk comes from the degraded performance. It will specify the correct oil viscosity (e.
H2 Heading: Understanding the Risks of Mixing Conventional and Synthetic Engine Oils
Regular, or conventional, motor oil is refined from crude oil, resulting in a product with a more inconsistent molecular structure. Always check the manual to confirm whether synthetic oil is recommended or required before making a decision that impacts your engine's longevity.
Or, a previous owner of your vehicle mixed oils, and you are now trying to understand the current state of the engine. The additive package in the synthetic is formulated to work with its specific base stock, and introducing a different base stock can throw this delicate balance off, potentially leading to decreased protection and efficiency.
Understanding the Risks of Mixing Oil Types in Your Engine
If you are transitioning from conventional to synthetic, a complete flush is not always necessary, but a full drain and replacement is ideal. Treat the mixed oil as a temporary state rather than a long-term solution.
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