Mystik SAE 15W-50 JT-8® Synthetic Blend Super Heavy Duty Engine Oil keeps you Ready for the Road Ahead™, effectively protecting equipment owners operating with older vehicles with either high hours or miles. This synthetic motor oil lends to meticulously balanced additive system and optimal base stock for filtered deposit control you can rely on. This higher viscosity grade heavy duty engine oil effectively extends the diesel engine life while operating in severe conditions. The Mystik SAE 15W-50 JT-8 Synthetic Blend Super Heavy Duty Engine Oil is recommended for commercial over-the-road fleets, construction equipment, buses, and other similar diesel-powered applications where premium quality engines are required. FleetPride is your First Click in Heavy Duty®.