Quote:
Originally Posted by Sean05
at first i thought the same thing..
but not according to this...
Motorsports and Professional have different SAE standards... not sure if professional are now the new oil or improved oil..
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Came across this thread.
http://m3forum.net/m3forum/showthread.php?t=433692
Other than different API ratings, SJ vs SM. Also a lower viscosity at 100C for the "newer" oil.