Fuel polishing is the process used to clean diesel fuel stored in tanks by removing water, sediment, and microbial contamination. Over time, stored fuel can accumulate contaminants if it isn’t tested and treated regularly.
Common Issues in Stored Diesel Fuel
Stored fuel can develop:
- Water
- Microbial growth (aka diesel bugs)
- Bacteria and biofilm
- Rust
- Dirt and sediment
Any of these contaminants can lead to engine failure at the most inconvenient times.
Symptoms of Diesel Fuel Contamination
Signs that your fuel may be compromised include:
- Clogged fuel filters
- Fuel system failure
- Worn or damaged fuel injectors
- Corroded tanks
- Engine failure
Protect Your Diesel Fuel and Equipment
A portable fuel polisher can clean your fuel on-site, keeping water, microbes, and sediment under control. Regular fuel polishing reduces downtime, prevents costly repairs, and extends the life of your equipment.
Contact Dieselcraft today to learn more about portable fuel polishing machines.

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