Ideal for vintage and antique vehicles, this oil is formulated for heavy-duty and military engine applications, as well as racing and performance use where a 40 SAE grade is required. It features Pennsylvania Grade base oil for superior anti-wear performance, high zinc content with added Moly, leak prevention, water contamination separation, and a higher pressure-viscosity coefficient. With modern additive technology in a vintage formulation, it's compatible with various fuels. However, it's designed for high-performance and racing applications only, not meeting current API or OEM specifications, and not suitable for vehicles with catalytic converters. Available in 1 gallon (each) or 4 gallons (case).