Fleet trial program
NüDef stabilizes diesel exhaust fluid and prevents the crystallization that destroys SCR injectors. Try it on your fleet — no commitment.
Talk to a NüDef fleet rep within 1 business day.
The problem
Once urea concentration drifts out of spec — from heat cycling, evaporation in storage, or low-quality DEF — solid crystals form on injectors and dosing modules.
Crystallization is the #1 cause of premature SCR failure on Tier 4 diesel engines. Replacing a fouled injector or DPF assembly runs $3,500–$8,000 and pulls the truck out of service for days.
Fleets running long-haul, oil-field, or vocational duty cycles see this fastest.
The fix
Compatible with all SCR-equipped diesel engines including Cummins, Detroit Diesel, Volvo, PACCAR, Mack, Caterpillar, and International. ISO 22241 compliant.
Within 1 business day. The fleet rep will set up a 15-minute call to understand your duty cycle, DEF volume, and current SCR pain.
Vehicle count, average DEF gallons per month, engine make/model mix, and any current SCR fault codes you're seeing. We don't need fuel cards or financial info.
No. NüDef meets the ISO 22241 DEF specification that every major OEM warranty references — Cummins, Detroit Diesel, Volvo, PACCAR, Mack. Warranty-safe by design.
You get a custom dose schedule for your fleet, a 30-day check-in to verify SCR fault-code reduction, and pre-negotiated volume pricing if you decide to roll out. Buying a case off the shelf gives you the same product but no support.
The conversation and the dose plan are free. If you want to actually run the additive on trucks, you'll buy a small starter quantity at standard pricing — quantity depends on your fleet size.
Yes. Tell us in the form notes and your fleet rep will handle procurement requirements (W-9, insurance, GSA, etc).
Apply for a fleet trial — no commitment, no auto-billing.
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