Description Mystik JT-8 Super Heavy Duty Engine Oil. A value-added synthetic blend lubricant with a carefully balanced additive system and premium base stock that gives outstanding deposit control. Recommended for commercial over-the-road fleets, construction equipment, buses, automobiles. BENEFITS: Sludge, varnish, and control wear are minimized under the most severe service conditions. Provides superior soot-handling and wear protection. Helps to maintain long-term low emission performance. Offers superior high temperature protection. Easier starting and rapid oil flow in cold weather.