Several of the Diesel oils keep changing their formulas to keep up with the EPA and the low ash modern small vehicles.
Shell was the first company that we started seeing issues with clutches slipping, and ratings change, such as removing the gasoline ratings etc.
Nobody seems to know what they've done with their products, but I've replaced almost a half dozen nasty, dirty, slipping clutches, with the new version, so I stopped using it, despite it having the wet clutch rating.
Now Valvoline, and Chevron Delo 400 have "new versions" such as generation II etc. which are showing the SP rating on the bottles. (resource conserving) so these are now in question as well.
There are still several good quality diesel oils out there that don't have this new rating (for now at least).
While it does not have the JASO MA rating or certification (this is questionable on the shell product as well) on the containers, Walmart sells the Super Tech brand 15w40 Heavy duty diesel oil that still has the gasoline rating, and the SN rating (which is not energy or resource conserving) and states its still good for gasoline engines.
I've been using this oil with good results, no clutch issues, and the UOA samples come back with very good numbers.
If your concerned with an oil that has the JASO rating (that has been certified, and not just implied) I would suggest you pick any known brand of motorcycle specific oil, that shows its been certified.
If your not concerned with this one rating, any of the SN rated diesel oils seem to still be working ok at this time.
Pay your dollar, take your chances.
I've opened up two clutches that have been using the Super Tech for close to 50k miles, and the clutches were clean and in good condition, unlike what I've found on the new shell versions of their 5w40 and 15w40 stuff.
Shell was the first company that we started seeing issues with clutches slipping, and ratings change, such as removing the gasoline ratings etc.
Nobody seems to know what they've done with their products, but I've replaced almost a half dozen nasty, dirty, slipping clutches, with the new version, so I stopped using it, despite it having the wet clutch rating.
Now Valvoline, and Chevron Delo 400 have "new versions" such as generation II etc. which are showing the SP rating on the bottles. (resource conserving) so these are now in question as well.
There are still several good quality diesel oils out there that don't have this new rating (for now at least).
While it does not have the JASO MA rating or certification (this is questionable on the shell product as well) on the containers, Walmart sells the Super Tech brand 15w40 Heavy duty diesel oil that still has the gasoline rating, and the SN rating (which is not energy or resource conserving) and states its still good for gasoline engines.
I've been using this oil with good results, no clutch issues, and the UOA samples come back with very good numbers.
If your concerned with an oil that has the JASO rating (that has been certified, and not just implied) I would suggest you pick any known brand of motorcycle specific oil, that shows its been certified.
If your not concerned with this one rating, any of the SN rated diesel oils seem to still be working ok at this time.
Pay your dollar, take your chances.
I've opened up two clutches that have been using the Super Tech for close to 50k miles, and the clutches were clean and in good condition, unlike what I've found on the new shell versions of their 5w40 and 15w40 stuff.
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