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 protec- tion on other critical engine parts. Insuficient 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-modiier-free formula allows the sharp peaks on newly honed cylinder walls (ig. "1) to partially latten. The result produces more surface area for rings to seat against, allowing formation of a dynamic seal that increases compression, horsepower and torque (ig. 2).

Protects Critical Parts from Wear

New lat-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 phospho- rus (ZDDP) additives designed to provide the anti-wear protection required during this critical period.

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 ilm responsible for preventing harmful metal-to-metal contact on rod and main bearings. The base oils in AMSOIL Break-In Oil provide increased ilm strength to protect bearings from wear.

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 recommenda- tions should be followed if available. Break-in period should not exceed 1,000 miles (1,600 km). When the engine is new, the exhaust ports will have a large area of oil residue (Fig. 3). As the rings begin to seat, 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. Afterward, drain and ill the engine with an AMSOIL high-performance synthetic oil that meets builder or manufacturer speciications.

GUARANTEED PERFORMANCE

Like our products, the AMSOIL Limited Warranty is built with an extra measure of protection. While some other oil companies guarantee their products only until you reach a specified mileage, we don't place restrictions on our warranty coverage based on total vehicle miles. 

We stand behind our products for as long as you use them!

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