METHODS FOR IMPROVING RESISTANCE TO TIMING CHAIN WEAR WITH A MULTI-COMPONENT DETERGENT SYSTEM
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United States of America Patent
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Issued Date -
Dec 6, 2018
app pub date -
Jun 5, 2017
filing date -
Jun 5, 2017
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Abstract
A method for reducing timing chain stretch in an engine comprising a step of lubricating said timing chain with a lubricating oil composition that includes a major amount of a base oil; and a minor amount of an additive package including at least one overbased calcium phenate detergent having a total base number of at least 150 mg KOH/g, measured by the method of ASTM D-2896, at least one calcium sulfonate detergent; and at least one magnesium-containing detergent. The lubricating oil composition has a weight ratio of total calcium from the at least one calcium sulfonate detergent to total calcium and magnesium in the lubricating oil composition of from about 0.06 to less than about 0.45.
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