I don't think you will find any oil that has a rating less than "SJ". SJ supercedes all others before it, such as "SH, SG, etc. Likewise, there will be a "SK" rating coming out later this year, which of course will supercede the current "SJ" rating.

__________________
1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member