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Break In Oil
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Product Code: BRK
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AMSOIL Break-In Oil is an SAE 30 viscosity grade oil
formulated without friction modifiers to allow for quick and
efficient piston ring seating in new and rebuilt
high-performance and racing engines. It contains zinc and
phosphorus anti-wear additives to protect cam lobes, lifters
and rockers during the critical break-in period when wear
rates are highest, while its increased film strength
protects rod and main bearings from damage. AMSOIL Break-In
Oil is designed to increase compression, horsepower and
torque for maximum engine performance.
Package sizes include:
1-Quart Bottle
1-Quart Bottles (case of 12) |
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Quickly Seats Rings
The primary goal during engine break-in is to seat the rings
against the cylinder wall. Properly seated rings increase
compression, resulting in maximum horsepower; they reduce oil
consumption and prevent hot combustion gases from entering the
crankcase. To achieve this, however, the oil must allow the correct
level of "controlled wear" to occur between the cylinder wall/ring
interface while maintaining wear protection on other critical engine
parts. Insufficient break-in leaves behind peaks on the cylinder
wall that prevent the rings from seating. The deeper valleys,
meanwhile, allow excess oil to collect and burn during combustion,
increasing oil consumption. Too much wear results in cylinder
glazing due to peaks "rolling over" into the valleys and preventing
oil from collecting and adequately lubricating the cylinder wall.
AMSOIL Break-In Oil's friction-modifier-free formula allows the
sharp peaks on newly honed cylinder walls (fig. 1) to partially
flatten. The result produces more surface area for rings to seat
against, allowing formation of a dynamic seal that increases
compression, horsepower and torque (fig. 2).
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Protects Critical Parts
from Wear
New flat-tappet camshafts and lifters are not seasoned or broken in
and must be heat-cycled to achieve proper hardness. During the
break-in period, these components are susceptible to accelerated
wear because they are splash-lubricated, unlike other areas of the
engine that are pressure lubricated. AMSOIL Break-In Oil contains
high levels of zinc and phosphorus (ZDDP) additives designed to
provide the anti-wear protection required during this critical
period. |
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Increased Film Strength
High-performance and racing engines often use aftermarket parts
designed to increase torque and horsepower. The added stress can
rupture the oil film responsible for preventing harmful
metal-to-metal contact on rod and main bearings. The base oils in
AMSOIL Break-In Oil provide increased film strength to protect
bearings from wear. |
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Product
Applications AMSOIL Break-In Oil is designed to effectively break in
high-performance and racing engines requiring SAE 30 oil, helping
maximize compression, horsepower and torque. |
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Recommendations
The engine builder's or manufacturer's break-in recommendations
should be followed if available. Break-in period should not exceed
1,000 miles. When the rings fail to seat, the exhaust ports will
have a large area of oil residue (Fig. 3). As the rings begin this
process, less oil is passed and the oil residue area begins to
shrink (Fig. 4). When the rings are fully seated and have formed a
tight seal against the cylinder walls, no oil residue will be
evident. Other common methods to determine if rings have seated
include performing a leak-down test or horsepower measurements over
time. Break-in duration will vary between engines. Afterwards, drain
and fill the engine with an AMSOIL high-performance synthetic oil
that meets builder or manufacturer specifications.
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