V-Series "ST" Motor Oils are formulated using highly refined petroleum base stocks and Torco's race proven MPZ® additive providing better cooling, cleaning, ring seal, deposit control and anti-wear protection. Maintains viscosity and provides thermal stability under high temperature environments. V-Series is specifically formulated for Harley® and custom v-twin engines.
Premium grade petroleum formula
MPZ® frictional loss technology
Prevents oil breakdown at high temperatures
Provides superior ring seal
Excellent wear protection
Extends piston and valvetrain life
Approvals: API SG, JASO-MA Applications: Recommended for use in early model air cooled v-twin engines where specified. Commonly used in Harley® (pre-1984: Knuckle, Pan, Shovel) and other early model custom v-twin applications.