Fuel Polishing

Fuel polishing is a process to remove water, sediment, and sludge down to (1) Micron from Diesel and Gasoline.

Man pumping fuel into car

Fuel Tank Services: Cleaning and Fuel Polishing

Newer automobiles have high-pressure fuel injection systems that require clean fuel to prevent fuel pump and injector damage. In diesel fuel tanks, colonies of filter-clogging bacteria and fungus grow where fuel and water meet in the tank; the byproduct of these colonies is acidic sludge, which corrodes tanks and engine components.

Indicators of dirty fuel may be slow flow of fuel from the dispenser nozzle.

Types of Fuel Contamination

Water contamination in fuel can include emulsified, dissolved, or free-standing water. All forms of water contamination can lead to tank Internal Corrosion shortening the life of the underground tank.

Microbial contaminants in fuel can include mold, yeast, bacteria, and organic matter, which can clog filters and lead to tank Internal Corrosion shortening the life of the underground tank.

Particulate contamination in fuel can include dirt, soot, rust, and other solid particles that can clog and damage combustible engines.in fuel can include dirt, soot, rust, and other solid particles that can clog and damage combustible engines.

A drop of fuel
Fuel Polishing - Coeur d'Alene Service Station Equipment - samples of fuel in jars

Benefits of Keeping Your Fuel Clean

Woman in laboratory testing a sample with a microscope

Fuel Cleaning for Backup Power Applications

Data center, research labs, hospitals, healthcare facilities, and nursing homes all need to be prepared in an emergency.

We can clean your tanks without any loss of product!

Woman fueling a car

Diesel Issues

Over the past several years, the sulfur content in diesel has gone from 5,000 parts per million to 15 parts per million to comply with emission standards. Reducing the amount of sulfur in diesel fuel makes the fuel vulnerable to microbial growth. When fuel becomes contaminated, the water in diesel fuel becomes a breeding ground for bacteria and fungus, which clogs filters.

Fuel impurities and debris in fuel settle out over time ending up on the bottom of the tank creating sludge. Each new load of fuel dropped into the tank stirs up the sludge allowing dirty fuel to be pulled up through the submersible pump, clogging the screen and filters at the Dispenser or Suction pump.

Prevention: A combination of Fuel Polishing and a Maintenance program of Diesel Fuel Treatments can help the tank longevity whether it be an underground/aboveground steel or fiberglass tank.

This applies to Gasoline tanks as well.

Ethanol Fuel Problems

Phase separation occurs to ethanol-blended gasoline when water is present. The water sinks to the bottom of the tank. Phase separated fuel has low octane and if the alcohol/water mixture gets into the engine, severe damage can occur.

Bulk storage tanks should be regularly inspected, and water should be gently removed to prevent phase separation. High-volume pumping of the fuel/water or transferring this mixture to a holding tank can be a costly mistake. As the product is mixed with water, more and more ethanol is removed causing partial phase separation that can become catastrophic phase separation. Catastrophic phase separation causes damage to petroleum equipment and customer vehicles.

When fuel becomes contaminated and is out of specification, the fuel can’t be sold.

Fuel Polishing - Coeur d'Alene Service Station Equipment - example of fuel in a flask

We’re Ready to Serve You!

Contact Us


Or fill out the form below

"*" indicates required fields

This field is for validation purposes and should be left unchanged.