Fuel contamination can be a real pain for businesses that count on diesel-powered equipment. Clogged filters, injector damage, and reduced fuel efficiency all stem from contaminated fuel — and could mean you’re in for unexpected downtime and expensive repairs. To prevent diesel fuel contamination, start with a look at the common risks and the proactive measures you can take to keep your fuel clean.
Contaminants tend to enter diesel fuel through improper storage, exposure to moisture, and degraded supply. The four threats below are the most common culprits of contamination in fuel:
Water is one of the biggest threats to diesel quality. Condensation forms inside tanks when temperatures fluctuate, and loose or damaged seals can allow rain or groundwater to seep in. Water in diesel fuel leads to microbial growth, fuel degradation, and corrosion inside the storage tank — a major safety concern as the tank weakens over time.
Diesel fuel naturally contains small amounts of microbes, but when water is present, they multiply rapidly. Even small amounts of water will feed bacteria and fungus that clog fuel systems. This microbial contamination — also called diesel “algae” or sludge — creates blockages in filters, injectors, and fuel lines. Bacterial growth also produces acids that degrade metal components in fuel storage systems.
Over time, dirt, dust, and rust will naturally accumulate in fuel storage tanks. Poor handling, corroded tanks, or aging infrastructure can introduce particles that settle at the bottom. When fuel is pumped, sediment mixes in and can clog filters and damage fuel injectors, reducing engine efficiency.
Exposure to air causes diesel to slowly break down and form dark, gummy deposits. This oxidation process creates thickened fuel that doesn’t combust properly. The result for your business will be a gradual increase in performance issues and engine maintenance costs.
Early detection prevents serious engine problems. Watch out for these typical warning signs of diesel fuel contamination:
Keep your fuel clean with proactive maintenance — and a trusted supplier! Strategic action can help prevent contamination right at the source:
Use fuel storage tanks designed for diesel, and follow fuel storage safety best practices to prevent contamination. Tanks should be sealed, regularly inspected, and placed on elevated ground to reduce water intrusion risks.
Routine fuel testing detects contamination before it becomes a problem. A reputable fuel delivery service will monitor fuel quality and ensure compliance with industry standards.
Always inspect your tanks frequently for rust, leaks, or debris buildup. Schedule a periodic cleaning to remove sediment and microbial growth. Water separators and fuel additives can also help extend fuel life and prevent degradation.
Consistently clean fuel starts with a trusted supplier. Whatley Oil has been providing high-quality diesel and fuel delivery services in Georgia and Alabama for decades. Make sure your business operates on contaminant-free diesel fuel with every order. Our well-maintained storage tanks, routine quality testing, and on-time fuel deliveries are your first line of defense against costly disruptions.
Call us up to learn more about our safe fuel handling practices, fuel tank maintenance, or to get started on a diesel delivery for your business.