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ACEA Class Definition
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A1: Gasoline engine oil with viscosity preservation and oxidation stability exceeding CCMC G-4 limits, providing fuel economy and valid for low viscosity classes.
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A2 : Conventional gasoline engine oil equivalent to G-5 for oxidation stability, generally in CCMC G-4 performance.
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A3 : Long-term, low consumption, high performance gasoline engine oil with viscosity preservation and oxidation stability exceeding CCMC G-5 limits.
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A4 : Gasoline engine oil developed for direct injection engines.
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A5 : Gasoline engine oil with low viscosity, high friction reduction feature, long oil change period, developed for high performance gasoline engines.
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