Remember old school Kendal GT-1? Brad Penn Penn-Grade 1 SAE 50 Racing oil provides a mono-grade alternative to 20w50 and offers a slightly less detergent formulation with a TBN of 8.0 and is highly effective for extremely stressed competitive engines. Heavy viscosity, straight-grade motor oil designed to provide superior lubrication to high-performance competition engines fueled by gasoline, methanol or nitromethane. Superior alcohol separation assures continual lubricant protection to the engine. For shipping outside the continental 48 states, please call us at 815-472-2939 to place your order.