I have seen in other corners of the interwebz that it is pretty popular to use diesel oil (Rotella/Delo/Delvac etc) in wet clutch motorcycle applications.
I have also heard that the diesel oil is not necessarily good with catalytic converters (which are on most light duty diesel vehicles nowadays).
Am I looking for trouble if I use one of the above in a late-model bike? My bike calls for 10W-30, and as motorcycle oils go, that is an unusual weight. Its readily available in Diesel oil.
Like everything on the Internet, you'll find some vocal opinions either way. With wet clutch bikes I personally tend to stick with m/c specific oil, but that's just me. Any reason you can't just use 10W40 instead of 10W30?
Diesel oil isn't loaded with ZDDP anymore (which is bad for cats if you're burning oil), with the new CK4 spec anything gas/diesel dual rated is 800ppm phosphorus max, Rotella is a bit higher since they dropped the gas rating from most of their oils. They've moved on to better ep wear additives.
I've been using Rotella T6 (synth) in all my street bikes since ~ 2000. No issues, although the only bike I've owned with a cat is my current ride ('15 FJ-09), which only has ~12k miles. Working great so far.
Most of the Rotella oils are JASO rated which is the Japanese motorcycle wet clutch spec so they should be ok.
In reply to cabbagecop:
Surprisingly not all of them, it is a look closely type of thing.
Amazon makes finding the right oil easy as pie. Why not just get what it calls for?
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