DEF Deposits and SCR Performance: What the Final PEAK BlueDEF Webinar Covers and Why It Matters for Your Shop

Source: Fleet Maintenance (October 27, 2026). Old World Industries announced the fifth and final session of its "DEFinitive Insights" webinar series, scheduled for November 10, 2026.

The session title is "Deposit Prevention: Clarity, Expertise, and the Future of Diesel Exhaust Fluid." Old World Industries, the manufacturer behind PEAK BlueDEF PLATINUM, is closing out its five-part technical webinar series by focusing on a problem that costs real money in a shop or fleet environment: DEF-related crystalline deposits forming inside Selective Catalytic Reduction (SCR) systems.

What the Webinar Addresses

The November 10 session will cover three practical areas:

• Causes of DEF deposit formation. Deposits typically result from urea crystallization driven by temperature cycling, injector spray pattern irregularities, or DEF that doesn't meet ISO 22241 purity and concentration standards. Substandard fluid is a common culprit that often gets misdiagnosed as a hardware failure.
• Where deposits form in the SCR system. The injector tip, mixing tube, and catalyst face are the most common locations. Each location has different diagnostic and cleaning implications, and each represents downtime if left unaddressed.
• How advanced DEF formulation reduces buildup risk. This is where BlueDEF PLATINUM's additive chemistry becomes relevant. The product is designed to go beyond the baseline ISO 22241 urea-water specification, targeting deposit inhibition as part of the formulation rather than treating it as a post-problem maintenance task.

Why This Matters at the Purchasing Level

If your shop or fleet runs SCR-equipped diesel equipment, DEF quality is a maintenance variable, not just a commodity purchase. A drum of off-spec or degraded DEF that causes a DEF injector fault or triggers a derate condition costs far more in labor and downtime than any savings at the pump. The ISO 22241 standard sets the floor for urea concentration (32.5%) and contaminant limits, but not all DEF products are formulated with deposit control in mind beyond that baseline.

Buying to a known specification from a consistent, traceable supplier is the straightforward way to remove DEF quality as a variable. BlueDEF PLATINUM is available at Bulk55 in formats suited to commercial volume: 55-gallon drums for shop use, 330-gallon totes for higher-throughput operations, and pallet quantities of 2.5-gallon jugs for service trucks or equipment that doesn't top off from a bulk tank.

BlueDEF PLATINUM at Bulk55

The 55-gallon drum is the practical starting point for most shop environments running multiple diesel units:

BlueDEF PLATINUM Diesel Exhaust Fluid - 55 Gallon Drum at $281.99

If throughput justifies it, the 330-gallon tote reduces per-gallon cost and handling frequency: BlueDEF PLATINUM 330 Gallon Tote.

For fleets maintaining service vehicles or equipment topped off in the field, pallet quantities of 2.5-gallon jugs are available in both half-pallet (40-count) and full-pallet (80-count) configurations.

The webinar is free to attend and oriented toward fleet and shop professionals. Registration details are available through Old World Industries and Fleet Maintenance. Whether you attend or not, the underlying question it raises is worth addressing in your procurement process: is the DEF you're buying formulated to protect injectors and catalyst surfaces, or just formulated to meet the minimum spec?