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5W30 Fully Synthetic Engine Oil, 4 Liters. The "5W" represents the low-temperature viscosity grade. The smaller the number, the better the low-temperature fluidity. The "30" indicates the high-temperature viscosity grade. The larger the number, the stronger the high-temperature protection capability. 5W-30 is the viscosity grade designation for engine oil formulated by the American Society of Automotive Engineers.
