- Diesel fuel degrades over time due to oxidation, contamination (e.g. water), and microbial growth.
- As it degrades, insoluble particulates and sludge accumulate, which can clog fuel filters and foul diesel engine injectors leading to, at best, poor performance or, at worst, catastrophic fuel system damage.
Why Test with Dyne:
- Test reports in 5-business days or less
- Free Diesel Fuel sample kits
- Free shipping within the contiguous United States (limited free 1-way shipping to Alaska, Hawaii, Puerto Rico, and Canada, inquire for details)
- Test reports in 5-business days
- Rush 24 hour turn-around available
- Comprehensive reports
- Tank tags
- Online access to results and return forms
- Automatic reminder service to make sure you are always current with your testing requirements
- Immediate communication with our quality technician or customer service staff
NFPA 25 Standard for Inspection, Testing and Maintenance of Water-Based Fire Protection Systems 2026 Edition
8.3.4.1* Diesel fuel shall be tested for degradation at least annually.
A.8.3.4.1 Biodiesel fuel might need to be tested for degradation more frequently.
NFPA 110 Standard for Emergency and Standby Power Systems 2025 Edition
8.3.7* A fuel quality test shall be performed at least annually using applicable ASTM standards or the manufacturer’s recommendations.
·ASTM D4057 provides guidelines for sampling diesel fuel. A bottom sample and an all-level sample are recommended for each diesel fuel storage tank.
A diesel fuel sample can fail due to storage conditions or contamination. Moisture can collect in the tank due to changes in temperature and this water should be regularly drained from the tank. The tank should also be kept clean. As the fuel breaks down, sludge can form and build up which can cause blockages and filters to clog.
NFPA 25 2026 Edition
8.3.4.2* If diesel fuel is found to be deficient in the testing required in 8.3.4.1.1, the fuel shall be reconditioned or replaced, the supply tank shall be cleaned internally, and the engine fuel filter(s) shall be changed.
8.3.4.2.1 After the restoration of the fuel and tank in 8.3.4.2, the fuel shall be retested every 6 months until experience indicates the fuel can be stored for a minimum of 1 year without degradation beyond that allowed in 8.3.4.1.1.
Dyne helps you meet Diesel Fuel testing requirements in the following standards:
- NFPA 25 Standard for the Inspection, Testing and Maintenance of Water-Based Fire Protection Systems
- 2026 Edition Section 8.3.4.1
- NFPA 110 Standard for Emergency and Standby Power Systems
- 2025 Edition Section 8.3.7
