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Viscosity Classification

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Published in: Genral Information

Viscosity classification chart


• Viscosity at various temperatures are related horizontally.
• Viscosities at various temperatures assume a VI of 95.
• ISO and AGMA viscosities are specified at 40ºC.
• SAE 20 to 50 and SAE 90 to 250 are specified at 100ºC.
• SAE gear and crankcase specifications are at 100ºC only.
• Multigrade oil viscosities are not representative at other temperatures.
• SAE 5W, 10W, 75W, 80W and 85W are based on low temperature
• specifications at 100ºF and 210ºF are shown.

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