Hot Shot’s Secret on Tuesday introduced its Ultra Premium DEF, a next-generation diesel exhaust fluid with patent-pending additive technology that the company says stabilizes the fluid, helps clean the SCR system, and protects it from crystal buildup.
The first rollout of Ultra Premium DEF will begin soon at O'Reilly Auto Parts stores nationwide.

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“Innovation has always been at the heart of Hot Shot’s Secret, and we had no interest in bringing another commodity DEF to market,” said Hot Shot’s Secret Brand Manager Josh Steinmetz. “Our team saw an opportunity to do something better. By incorporating our patent-pending Premium DEFender technology directly into the fluid, we created a product designed to help protect the SCR system while supporting long-term performance and reliability.”
As an American Petroleum Institute-certified DEF, Ultra Premium DEF is recommended for any diesel vehicle or equipment with an SCR system, including pickups, cars, vans, semi-trucks, agricultural and construction equipment, and industrial applications. Made with high-grade synthetic urea and triple-filtered for purity, it exceeds industry standards for DEF fluid.
Hot Shot’s Secret put together the following video with more information about its new DEF offering:
[Related: EPA to end DEF derates, roll back emissions warranty reg]

























