SJ rating

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Old 05-15-09, 12:54 PM
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SJ rating

What does the "SJ" rating after 10w30 SJ on an engine oil label mean?
 
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Old 05-15-09, 02:00 PM
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S is the service rating and J is the series. SJ was formulated in 1990 and is almost obsolete.
I believe that SM is the newest formulation.
 
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