The DEF Industry Blog
In-depth guides, compliance updates, and practical advice for fleet managers, equipment operators, and construction site supervisors. Everything you need to keep your diesel operation running efficiently and compliantly.
Mining DEF Storage: Tanks, Heat, Cold and Contamination Control
How to store diesel exhaust fluid at a mine site: tank materials, heat and freezing limits, contamination control, sizing and refilling practices for haul fleets.
How to Prevent DEF Contamination in Your Fleet
Most DEF contamination starts in storage and transfer, not in the truck. Here is how fleet managers keep it out: equipment, cleaning, storage, checks and response.
DEF and Warranty: What Protects Your Engine Coverage
DEF itself carries no warranty, but bad DEF can void your aftertreatment coverage. Learn what manufacturers expect, how claims get denied and how to protect yours.
DEF Storage Tank Setup: Materials, Layout and Fill Practices
How to set up a DEF storage tank: approved materials, site and temperature, dispensing gear, filling hygiene and records, so your fluid stays ISO 22241 quality.
DEF for Standby Generators: How to Size Tank and Supply
Size DEF tank and resupply for a Tier 4 Final standby generator: gallons per hour at 25% and 100% load, runtime math, freeze and shelf-life limits, worked examples.
Transporting DEF in a Pickup: Safe Containers, Heat and Freeze Limits
How to haul diesel exhaust fluid in a pickup bed or cab: the right containers, heat and freeze limits, securing the load, and mistakes that ruin a batch.
SCR Derate After a DEF Refill: Why It Stays On and What to Do
Refilled DEF but the SCR derate is still on? Learn why the ECM lags, which faults keep a truck limited, and how to diagnose it without tripping tamper mode.
DEF Contamination Fix: How to Drain, Clean and Recover
How to fix contaminated DEF: stop the truck, drain the tank, replace what filters can’t clean, refill with ISO 22241 fluid and verify with a scan tool.
DEF Thermal Degradation: Heat, Shelf Life and SCR Deposits
What thermal degradation means for diesel exhaust fluid: how heat shortens DEF shelf life, how SCR deposits form, and what fleets can do to prevent both.
Test Your Fleet’s DEF Usage Formula Against the 3% Estimate
Use a DEF usage formula to estimate gallons from diesel or miles, then run a short fleet baseline test to replace the 3% estimate before ordering.