Diesel Exhaust Fluid works with all SCR-equipped diesel engines.

Developed for all diesel engines equipped with Selective Catalytic Reduction system, Prestone Command™ DEF is a colorless, odorless, non-toxic, and non-flammable liquid solution consisting of 67.5% demineralized water and 32.5% automotive-grade urea.

[source: http://news.thomasnet.com/fullstory/Diesel-Exhaust-Fluid-works-with-all-SCR-equipped-diesel-engines-20002196]