Keep Your Diesel Running Strong: Protect Your DEF & SCR Systems with Rislone

Avoid Costly Repairs. Boost Performance. Drive with Confidence.

Your diesel vehicle is a workhorse—whether it’s hauling loads, tackling tough terrain, or getting you through the daily grind. But hidden beneath the hood, your Diesel Exhaust Fluid (DEF) and Selective Catalyst Reduction (SCR) systems are working overtime to keep emissions in check. Neglect them, and you’re risking white crystal buildup, warning lights, limp mode, and sky-high repair bills. Rislone’s cutting-edge Diesel Exhaust Fluid products are here to stop trouble before it starts—and keep your engine running like new.

 

Why Your DEF & SCR Systems Matter

The Unsung Heroes of Your Diesel Engine

Until now, you may not have paid much attention to them, but your SCR system and DEF work together to cut emissions and keep your diesel compliant with tough government standards. But here’s the catch: without proper care, urea crystals from DEF can clog your tank, pump, lines, and injector—leading to reduced power, higher fuel costs, expensive repairs, and even a stranded rig. Don’t let neglect sideline your ride.

Technical schematic of the emissions system found in diesel vehicles.

Rislone: The Diesel Owner’s Secret Weapon

Over 100 Years of Engine Expertise in Every Bottle

For more than a century, Rislone has been the trusted name in premium automotive performance chemicals. Our Diesel DEF Treatment (p/n 4780 and p/n 4782 for larger size) and DEF Crystal Clean® (p/n 4784) are engineered by gearheads who know diesel inside and out. These aren’t just additives—they’re your first line of defense against SCR breakdowns and your ticket to peak performance.

What Rislone Diesel DEF Treatment and DEF Crystal Clean® can do for you:

  • Prevent Crystal Buildup: Stops deposits from forming before they choke your system.
  • Restore Power: Prevent P20EE and other diesel-related OBD codes and get you back to full throttle.
  • Save Money: Avoids repairs that can cost thousands.
  • Improve DEF/AdBlue Performance: Eliminate the downsides of DEF.

 

Which Rislone Product Is Right for You?

Tailored Solutions for Every Diesel Driver

Rislone Diesel DEF Treatment – Your Everyday Maintenance Must-Have
Add with every DEF fill-up to keep crystals at bay and your system running smoothly. Perfect for daily drivers, weekend warriors, and fleet owners who demand reliability and the prevention of DEF-related maintenance issues. A larger size [link to 4782] is available as well for bigger jobs.

  • Works with all UREA/AdBlue DEF fluids
  • Prevents crystal formation
  • Won’t void your warranty
  • Easy to use: Just pour and go

 

LEARN MORE ABOUT DIESEL DEF TREATMENT

 

Rislone DEF Crystal Clean® – The Heavy-Duty Fix for Clogged Systems
Already seeing warning lights or limp mode? Is your performance suffering? This powerful cleaner dissolves existing deposits and restores your SCR system to like-new condition. Use every 5,000 months for ongoing results.

  • Excellent for diesel vehicles driven regularly at slow speeds, low loads, short durations or make frequent stops as these are more prone to having the problem of crystallization deposit build up in the SCR system
  • Clears P20EE and other OBD codes
  • Cleans injectors, pumps, and lines
  • Gets you back on the road fast

 

LEARN MORE ABOUT DEF CRYSTAL CLEAN

 

 

Real Drivers, Real Results

Hear from Diesel Owners Like You

“My truck went into limp mode out of nowhere—warning lights galore. One bottle of DEF Crystal Clean®, and it’s like I’ve got a new engine. Rislone saved me a $2,000 repair!”
– Jake M., Montana

“I add Diesel DEF Treatment every fill-up. No more worrying about crystals or codes. My rig runs smoother than ever.”
– Sarah T., Texas

– “I’ve been using Rislone Diesel DEF Treatment for a while now, and it’s an absolute must-have for anyone who wants to keep their diesel engine running smoothly.”
– Bayou Bliss LLC

“Kept having DEF related issues and cleaned up my tank/system quickly. Love how the bottle was designed to pour in the tank. Will be buying again.”
– LV Davis

 

Don’t Wait for Trouble to Strike

Protect Your Diesel Today

Every mile you drive without Rislone is a gamble with your DEF and SCR systems. Why risk breakdowns, downtime, or hefty mechanic bills? Take control with Rislone—because your diesel deserves the best.

  • Available Nationwide: Available at AutoZone, O’Reilly Auto Parts, Advance Auto Parts, NAPA, Walmart.com and Amazon
  • Made in the USA: Quality you can trust – engineered and manufactured in USA.
  • Limited Rebate Offers Available: Save $5 on Diesel DEF Treatment, or save $15 when you buy both together. Rebate offer valid through 12/31/25.

 

LEARN MORE ABOUT REBATE OFFERS