What it is
Break-In is a soluble molybdenum together with anti-foaming agents and corrosion inhibitors specifically designed to increase the load capacity of oil in the initial and critical first hours of operation in new and rebuilt engines.
Why it is important
Even with extensive machining and honing of the surfaces on new or rebuilt engines, under microscopic view these surfaces (i.e. rings to cylinder wall, cam to lifters) look like two mountain ranges passing over each other. As these peaks pass over each other, they actually weld together and then shear apart, creating tremendous friction and heat. This is the reason why new or rebuilt engines will run at higher than normal temperatures during the break-in period. Break-In helps to eliminate scuffing and scoring and promotes the flowing out of metal high points. These high points are flattened, not broken away.
Where to use Break-In
Break-In is ideally suited for performance type engines in cars and boats where the luxury of a normal break-in period at low speeds is not available. In normal everyday use, the benefit of using Break-In in the engine’s early life will ensure a longer life and delay, by thousands of miles, the inevitable costly rebuild.