Q
motor oil grade designations
Motor oil grade designations, such as 5W-30 or 10W-40, tell us about the oil's viscosity characteristics and its performance at different temperatures. The number before the 'W' (which stands for "Winter") indicates the oil's flow at cold temperatures, while the number after denotes its viscosity at 100°C, representing engine operating temperature. Lower numbers mean the oil flows more easily, important for cold starts, while higher numbers indicate better viscosity retention at high temperatures. These grades are set by the Society of Automotive Engineers (SAE) and are critical for ensuring engine protection and efficiency. Using the recommended oil grade for your vehicle, typically found in the owner's manual, optimizes engine life and performance. Manufacturers formulate oils to meet specific conditions, so adhering to their recommendations can prevent mechanical issues and optimize fuel efficiency.
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