Thread: Castrol TWS
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      02-02-2013, 04:27 PM   #36
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Originally Posted by Sean05 View Post
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..
Came across this thread.

Other than different API ratings, SJ vs SM. Also a lower viscosity at 100C for the "newer" oil.
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