HR-3 High Zinc Synthetic 15W-50 Quart

Excellent protection for supercharged, big block and looser clearance engines. Ideal for long stroke and/or high compression engines. Safe for O2 sensors and vehicles equipped with catalytic converters. Features storage protection additives that guard agains rusht and corrosion during winter storage. No ZDDP or additives required. Viscosity typical of 15W-50.