High Fuel Temperature Warning?

Your diesel fuel may be contaminated, oxidized, or degrading internally — especially if it’s over 2 years old.
Request Fuel Testing Assistance

Old Diesel Fuel Can Destroy Injectors & Generators

Diesel fuel stored longer than 12–24 months can develop oxidation, sludge, microbial growth, varnish, and water contamination. Even if fuel has been treated with anti-gel additives, contamination can still cause:

High Fuel Temperature Alarms

Restricted fuel flow and oxidized fuel increase injector return fuel temperatures.

Plugged Fuel Filters

Diesel sludge and biomass contamination rapidly clog filtration systems.

Injector Damage

Contaminated fuel reduces lubrication and increases injector wear.

Generator Shutdowns

Fuel starvation and overheating can trigger automatic shutdown conditions.

Recommended Diesel Fuel Tests

ASTM D2709

Water & sediment analysis to identify free water, rust, sludge, and contamination.

ASTM D2274

Oxidation stability testing detects fuel degradation and varnish formation.

Microbial Testing

Detect diesel algae, bacteria, and fungal contamination inside storage tanks.

ISO Particle Count

Measures microscopic contamination damaging modern injectors and fuel systems.

WARNING: Diesel additives do NOT remove water, sludge, oxidation, or microbial contamination. Fuel over 24 months old should be tested immediately.

Common Symptoms of Degraded Diesel Fuel

  • High fuel temperature alarms
  • Frequent filter plugging
  • Dark or cloudy fuel
  • Black slime inside tanks
  • Hard starting generators
  • Injector noise or poor combustion
  • Generator shutdown under load
  • Water separator alarms

Emergency Fuel Recovery Services

Dieselcraft fuel polishing systems remove:

  • Water contamination
  • Diesel sludge
  • Microbial growth
  • Fine particulate contamination
  • Oxidized fuel deposits

Continuous fuel polishing restores fuel quality while reducing injector wear and generator downtime.

Need Help Diagnosing Old Diesel Fuel?

Contact Dieselcraft for fuel testing recommendations, contamination diagnosis, and fuel polishing solutions. Request Fuel System Evaluation

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Fuel Contamination Detected? Act Now Before Injector Damage Occurs. Get Help