API 1551 PDF
This publication has been prepared to provide a better understanding of the important functions of today’s motor oils and to explain what the motorist should do to protect and prolong engine life.
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Motor Oil Guide
American Petroleum Institute , 09/01/1996
API 1551 PDF
This publication has been prepared to provide a better understanding of the important functions of today’s motor oils and to explain what the motorist should do to protect and prolong engine life.