The cold cranking simulator (CCS) test measures an engine oil’s ability to flow and provide lubrication at low temperatures, such as cold engine start. Oils must have adequate low temperature pumpability.
In the CCS test, a small electric motor referred to as the simulator cranks a cold-soaked oil sample at a set temperature. The torque needed to maintain cranking speed is measured. Lower values indicate better low temperature flow.
Typical CCS testing temperatures are -15°C or -20°C for passenger car motor oils and -25°C for heavy duty diesel oils. Limits are set by viscosity grade. For example, SAE 5W-30 oil must have a CCS value below 6600 cP.
Oils can be reformulated with flow improvers to obtain passing CCS values for a desired viscosity grade. However, excessive treatment can influence other properties. Proper balance is required.
Rely on Valorem Chemicals for optimal low temperature engine oil performance.
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