Summit DHP Series oils are formulated using the highest quality synthetic PAO base stocks and advanced additive technology available. We offer viscosities to cover a wide range of downhole operating temperatures: 150 cSt, 220 cSt, 320 cSt, and 680 cSt. The high viscosity index of the series ensures flow for above ground cold weather to below ground high temperature extremes. The unique additive package used in the DHP Series protects against ESP failure in the field. There are many reasons for pump failures, use of poor motor oils should not be one of them.