For diesel owners, few things are more frustrating than DEF system issues that sideline your rig. From crystallization in DEF (diesel exhaust fluid) lines to sudden fault codes, these problems can trigger limp mode, ruin performance, and cost thousands in repairs. Hot Shot’s Secret, America’s no-nonsense diesel additive brand, has launched a new solution called Premium DEFender Concentrated Crystal Eliminator + DEF Booster.

This next-generation diesel DEF additive is engineered to clean, protect, and extend the life of Selective Catalytic Reduction (SCR) systems, keeping diesel trucks, semis, and equipment running strong.

Why SCR Systems Can Be Problematic

Modern SCR systems are great for emissions but notoriously prone to problems. Over time, DEF can crystallize, clogging injectors and restricting flow. This leads to reduced efficiency, trouble codes (like P20EE, P204F, and P207F), and in many cases, limp mode. Hot Shot’s Secret Premium DEFender targets these exact issues, preventing downtime before it starts.

How The Premium DEFender Diesel DEF Additive Works

Hot Shot’s Secret designed Premium DEFender to clean, protect, and enhance the SCR emissions systems of modern diesel engines:

• Prevent and eliminate crystallization buildup in DEF injectors and lines.
• Restore spray patterns to factory specs.
• Lubricate pumps and injectors to reduce wear and extend system life.
• Stabilize DEF and lower its freezing point

As Brand Manager Josh Steinmetz explains:

Modern diesel emissions systems are increasingly complex, and DEF-related issues are one of the leading causes of downtime, derates, and costly repairs. Premium DEFender was developed to address these real-world challenges by clearing common trouble codes like P20EE, P204F, and P207F, while keeping the SCR system operating at peak efficiency. With just one treatment added during each DEF refill, it serves as both a preventative measure and a powerful solution for existing DEF-related problems.

A Safe, Compatible, and Affordable Diesel DEF Additive

From pickup trucks to semis and ag equipment to RVs, triple-filtered Premium DEFender is compatible with all SCR-equipped diesel engines and is fully safe for use with all DEF brands. It’s dye-free, ash-free, and won’t void manufacturer warranties.

Each 8-ounce bottle treats 20 gallons of DEF (the equivalent of eight 2.5-gallon cubes). At just $9.99 MSRP, it’s an inexpensive way to protect your SCR/DEF system and prevent limp mode. Available now at HotShotSecret.com and through independent dealers nationwide.

Final Take For Diesel Owners

For anyone serious about reliability, the Premium DEFender diesel DEF additive is peace of mind. By preventing DEF crystal buildup, protecting pumps, and clearing fault codes, it ensures your diesel runs clean, efficient, and trouble-free. If you want to prevent limp mode, protect your SCR system (and hate it a little less), and avoid costly downtime, consider Premium DEFender from Hot Shot’s Secret.