Dry-sump oiling systems are expensive and complicated, but losing a race because your engine seized from a lack of lubrication is even more expensive and complicated. This spun-aluminum oil tank is just one of several components of a dry-sump system. The term refers to the way that the oil is stored in a remote tank instead of in the oil pan. A dry-sump oiling system uses a system-specific external oil pump that scavenges oil as it exits the engine and sends it through a filter, a cooler, and to the external tank. The engine draws the cool filtered oil from the bottom of the tank. In addition to storing the engine oil, a dry-sump tank flows the oil over a series of baffles that separate air bubbles out of the oil. Cool, clean air-free oil provides reliable lubrication for high-horsepower, highly stressed racing engines.