JASO M345 is a Japanese automotive standard established by the Japanese Automobile Standards Organization (JASO) that pertains to engine oils, specifically for vehicles using gasoline engines. This standard sets out the performance requirements and test methods for engine oils intended for use in modern gasoline engines. JASO M345 includes classifications for engine oils based on their performance in terms of lubrication, oxidation stability, wear protection, and other critical characteristics essential for ensuring optimal engine performance and longevity.
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