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I just bought 4 quarts of Mobil One Racing 4T 10W40 at Advanced Auto and the quart jugs are in a "Black bottle" and on the back it has ( JASO MA, API SG, SH/CF ). I also found Mobile One Racing 4T 10W40 at Wal-Mart, but their's is in a Silver quart bottle and on the back of the "Silver bottle" it has ( JASO MA, API SJ, SH, SL, SM ). My question is, what is the difference in these oil's besides the color of bottle and the JASO ratings???