If you own or operate a diesel vehicle or heavy equipment manufactured in the years following 2010, you’ve likely encountered Diesel Exhaust Fluid (DEF). This essential component helps your diesel engine run cleaner and comply with environmental regulations.
While there are plenty of brands available for DEF, what you might not know is how fragile DEF really is — it can degrade easily, especially when exposed to air or improper temperatures. This is where NuDEF comes in — not as a DEF replacement, but as a stabilizing additive that keeps DEF in optimal condition, ensuring your emissions system performs reliably.
What Exactly is DEF?
So what exactly is diesel exhaust fluid, and what makes it so important for diesel cars or heavy machinery?
DEF is a precisely formulated solution consisting of 32.5% synthetic urea and 67.5% de-ionized water. Compared to gasoline engines, diesel engines require higher temperatures to efficiently combust fuel. However, these high temperatures also create harmful nitrogen oxide (NOx) emissions.
When injected into your exhaust stream, DEF triggers a chemical reaction that converts these pollutants into harmless nitrogen and water vapor.
How a Quality DEF Additive Like NuDEF Protects Your System
NuDEF doesn’t replace DEF — instead, it preserves it. By preventing DEF from crystallizing when exposed to air or fluctuating temperatures, NuDEF protects your vehicle’s Selective Catalytic Reduction (SCR) system from clogs and damage.
This additive ensures your DEF remains stable, helping maintain clean emissions and avoiding costly repairs or system downtime due to degraded fluid.
Performance & Shelf Life Benefits
By protecting the quality of DEF, NuDEF indirectly supports your diesel engine’s performance. Stable DEF ensures proper NOx reduction, optimal SCR functioning, and fewer warning light issues caused by crystallized or spoiled fluid.
When properly stored (ideally between 40°F and 80°F), NuDEF-treated DEF can last up to two years. This makes NuDEF a smart investment, especially for fleet managers and anyone storing DEF in bulk.
Avoid Compliance Risks with Stabilized DEF
Modern diesel vehicles now come equipped with DEF monitoring systems. If DEF goes bad, your vehicle could reduce engine power or fail to restart until the fluid is replaced.
By using NuDEF as an additive, you’re not just protecting your DEF tank — you’re safeguarding your engine’s uptime, regulatory compliance, and overall performance.
Final Note
NuDEF is not DEF. It’s an essential additive that helps keep DEF from degrading or crystallizing, especially in harsh environments or long-term storage. Investing in NuDEF means protecting your emissions system, extending DEF shelf life, and keeping your diesel engine running like it should