Sunoco Super C 50 is a Mono-grade heavy duty Manual Transmission Fluid. Super C is a mixed fleet diesel engine oil line manufactured by Sunoco Lubricants. The mono-grade or straight weight engine oils can be used in over-the-road diesel trucks, off highway diesel equipment, farm tractors, and passenger cars and light trucks with diesel and gas engines. These mono-grade oils are also commonly used for the lubrication heavy duty transmissions and final drives. 50 is the thickness of the oil based on Society of Automotive Engineers (SAE) standards.
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