Clutches and oil.

William K Denton wkdenton at
Mon Apr 29 18:20:23 PDT 2013

What you need to look for is the JASO-MA rating on the oil..

As recently as ~2011, Shell added the JASO-MA rating** to their 15W-40 
Rotella-T and 5W-40 T6 oils.  If you look at motorcycle specific oils 
(except for HD oil) you'll also see this rating.

Bill Denton
Yardley, PA
wkdenton at
Lazarus Cycleworks, LLC
We Breathe New Life into Old Bikes

----- Original Message ----- 
From: <walkerjl at>
>From what I understood, that change didn't happen to diesel oils, like the 
Rotella, but since then I suppose its which case I'll be 
bummed out because that's my favorite motorcycle oil as it helps make the 
shifting buttery smooth 

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