Amsoil Engine Break-In Oil (SAE 30) 946 mL BRKQT

AMSOIL SAE 30 Break-In Oil is an SAE 30 viscosity grade oil formulated without friction modifiers to enable fast, efficient piston ring seating in new and rebuilt high-performance and competition engines. It contains zinc and phosphorus antiwear additives to protect cam lobes, lifters, and rocker arms during the critical break-in period when wear rates are highest, while its increased film strength protects the connecting rod and main bearings from damage.
AMSOIL SAE 30 Break-In Oil is designed to increase compression, horsepower, and torque for maximum engine performance.

The primary objective during engine break-in is to seat the rings against the cylinder wall. Properly seated rings increase compression, resulting in maximum power; they reduce oil consumption and prevent hot combustion gases from entering the crankcase. However, to achieve this, the oil must allow the correct level of controlled wear to occur between the cylinder wall and ring interface, while maintaining wear protection on other critical engine parts. Insufficient break-in leaves peaks in the cylinder wall that prevent the rings from seating. Meanwhile, deeper valleys allow excess oil to accumulate and burn during combustion, increasing oil consumption. Excessive wear results in cylinder glazing because the peaks slide into the valleys and prevent the oil from properly collecting and lubricating the cylinder wall.

For high-performance and racing engines
Allows for quick and efficient seating of piston rings
Helps maximize compression, power and torque
Properties
Quickly seats rings
Protects critical parts from wear
Greater film strength
Application: The engine manufacturer's or builder's break-in recommendations should be followed, if available. The break-in period should not exceed 1,000 miles. When the engine is new, the exhaust ports will have a large surface area of oil residue.
As the rings begin to break in, less oil passes through, and the oil scum area begins to shrink. When the rings are fully seated and have formed a tight seal against the cylinder walls, no oil scum will be evident. Other common methods for determining ring scum include performing a leak-down test or power measurements over time. Break-in duration varies by engine. Then, drain and refill the engine with AMSOIL High-Performance Synthetic Oil that meets the manufacturer's specifications.