SuperHD 50 Motor Oil is an API licensed CF/CF2/SL, premium quality, heavy-duty engine oil. SuperHD 50 Motor Oil is formulated from premium quality base stocks and advanced additive technology, providing the highest levels of equipment protection available. SuperHD Motor Oils meet the Caterpillar ECF-1 specification. SuperHD Motor Oils are available in 5 viscosity grades to comply with virtually all equipment applications. Equipment manufacturers’ recommendations and conventional guides to lubricant selection should be followed to determine the best SuperHD Motor Oil grade for a specific application.