Steve B wrote:
> My interest is now piqued. I know that the Cummings engine is a variant of
> the Cummins. DUH!
>
> But now, is the Cumins yet another variation?

The Cumin is. It's made to run on biodiesel -- and not just any
biodiesel, but specifically refined from this:
http://en.wikipedia.org/wiki/Cumin