Speedwurx Engine Assembly Oil is a specialist lubricant developed to protect critical engine components during the assembly process and initial start-up. Formulated to stay in place where standard oils would run away from mating surfaces. It coats bearings, sleeves, cranks, and piston skirts with a thin microscopic film that resists breakdown under pressure, reducing dry-start wear and helping ensure lubrication on first fire-up. Whether you’re rebuilding, upgrading, or bench-testing, Speedwurx Engine Assembly Oil helps set the foundation for long-term engine performance. Specifications Miscible with Speedwurx RTR & Competition Fuel Products. Protects internal engine components during assembly. Clings to surfaces and resists run-off or drainage. Reduces wear during the first-fire and early run-in stages. Safe for bearings, sleeves, cranks, and pistons. Supplied in a needle-tip applicator bottle for precise use