Edelbrock part #1070 High Performance SAE 30 Break-In Oil is a unique blend of hydro-processed petroleum base stocks and additives is ideal for preparing metal surfaces in new and rebuilt engines. The high zinc content ensures proper separation of all critical mating surfaces, giving camshafts and valvetrain components a protective layer of hydrodynamic film during the crucial break-in process. The first startup of any engine is critical to its performance; this formula provides the correct amount of cleaning agents vital to newly machined parts. Single 1 qt. bottle.