Maxima’s Extra Formula B Specialty Series 4-cycle engine oil is a full synthetic, ester-based high performance oil. Industry leading additive system offers the ultimate in engine performance and protection. Technologically advanced package contains special anti-wear/extreme pressure additives to protect critical engine components from extreme loads and peak temperatures generated by high-performance engines. Regenerative, high viscosity index, synthetic polymer system resists mechanical break-down and viscosity loss of the oil. EXTRA delivers increased horsepower& torque, superior engine cleanliness, reduces wear on bearings, cams, lifters, crankshafts and extends engine life. High Zinc / Phosphorous formula engineered for use in flat tappet and roller element engines.