American Auto Parts & Marine is a supplier of auto parts, tools, equipment, and marine supplies to US government agencies and other customers. They offer a wide range of products such as diesel conditioners, fuel biocides, anti-gel additives, and lubricity enhancers for diesel fuels. The company focuses on providing solutions to enhance fuel stability, prevent microbial growth, improve engine performance, and protect vital engine components. Additionally, they specialize in offering a full range of auto and marine parts from various manufacturers and have a history of securing US government contracts for small American businesses.