Dirty diesel shuts equipment down.
Stored diesel degrades over time. Water, sludge, sediment, and microbial contamination build up in tanks that sit.
Water in Fuel
Water settles to the tank bottom and feeds microbial growth. It causes injector damage, rust, and filter failure.
Sludge & Sediment
Tank sludge clogs filters, scores injectors, and gets worse the longer it sits.
Microbial Growth / Diesel Bug
Bacteria and fungi grow at the water-fuel interface — often called diesel bug. Produces filter-clogging biomass.
Dark or Cloudy Fuel
Discolored or hazy diesel indicates oxidation, contamination, or degradation. Fuel stored 12+ months is at risk.
Clogged Filters
Repeated fuel filter plugging is a symptom, not a root cause. Contaminated stored diesel is likely the problem.
Generator Reliability Risk
A generator that fails to start when the power goes out is the worst case. Emergency power depends on clean fuel.
Not sure if your fuel is bad?
Start with a fuel sample and visual inspection. We assess color, clarity, water content, and sediment. Tank size, access, contamination level, and fuel condition determine the correct service.
Not every tank needs the same treatment. We tell you what we find before you decide how to proceed.
Mobile diesel fuel services at your location
No trucking. No downtime from hauling equipment. We bring our equipment to you.
Mobile Diesel Fuel Polishing
Multi-stage filtration removes water, sediment, sludge, and microbial contamination while fuel stays in the tank.
Learn more →Diesel Tank Cleaning
When bottom sludge, water accumulation, or corrosion is present, tank-bottom cleaning removes what filtration cannot reach.
Learn more →Fuel Testing & Sampling
Start with a fuel sample before committing to a full service. Visual inspection, water and sediment checks.
Learn more →Generator Fuel Maintenance
Backup generators depend on clean stored diesel. We test and polish generator fuel so emergency power is ready.
Learn more →Marine Diesel Fuel Cleaning
Boat and marine diesel tanks are prone to water ingress and microbial growth. We service boat tanks and marina storage.
Learn more →Fleet / Equipment / Ag Tank Service
Farm tanks, winery storage, construction equipment, and fleet tanks. Keep stored fuel clean and equipment running.
Learn more →What contaminated fuel looks like
The difference between contaminated and clean diesel is visible.
How mobile fuel polishing works
Every job starts with an honest assessment. We tell you what we find before we start.
Inspect and Sample
We arrive at your site and assess the tank. We take a fuel sample for visual inspection and note tank condition, access points, and fuel volume.
Identify Contamination
We identify water, sediment, sludge, microbial contamination, and signs of oxidation. We explain what we find before starting work.
Polish Through Mobile Filtration
Fuel is circulated through our mobile filtration system, removing particulates and water. Fuel stays in your tank.
Remove Water, Sediment & Clean Tank Bottom
When required, we remove the water layer and bottom sludge. Tank-bottom cleaning scope depends on tank design and access.
Treat or Stabilize When Appropriate
When fuel condition warrants it, a stabilizer or biocide treatment can be applied. We explain the rationale.
Findings & Maintenance Recommendation
We document what we found, what we did, and what we recommend. You get a clear picture before and after service.
Who we serve
We work with facilities managers, marina operators, contractors, wineries, farmers, fleet operators, and property managers throughout Solano and Napa Counties.
Backup Generators
Emergency power systems cannot fail when the power goes out.
Wineries & Ag
Seasonal diesel storage is common in wine country. We service winery tanks throughout Napa and Solano.
Marinas & Boats
Marine diesel tanks are prone to water and microbial contamination in humid environments.
Contractors
Jobsite equipment runs on stored diesel. Contaminated fuel means downtime when the job demands it.
Fleets & Transport
Fleet operators with stored diesel inventory need fuel that performs consistently.
Farms & Ranches
Farm tanks often go months between uses. Stored diesel needs to be clean when the season starts.
Commercial Buildings
Property managers with backup power systems need a reliable service provider who works on-site.
Emergency Storage
Critical facilities depend on stored diesel that meets strict reliability standards.
Fuel polishing is usually cheaper than the alternative.
Pump out, dispose, and refill — plus downtime and disposal costs.
Contaminated diesel degrades injectors, pumps, filters, and seals.
A generator that fails to start has a cost that exceeds the polishing service.
How pricing works
Pricing depends on tank size, fuel volume, accessibility, contamination level, and whether tank-bottom cleaning is required. We do not publish flat rates because no two jobs are the same.
Request a quote and we will assess the situation and provide an honest estimate before starting work.
Local service area
We serve Fairfield, Vacaville, Napa, and the surrounding North Bay. Bay Area by request.
Frequently asked questions
Stop guessing what is in the tank.
Request a fuel test or quote. We come to your site — no trucking required.