- Complete Sludge & Contamination Removal
- Thorough Tank Inspection
- Fuel Recovery and Safe Disposal
- Detailed Service Documentation
Louisville’s Go-To Team for Fuel Tank Health
Fleet Core isn’t a national broker that passes your job off to a subcontractor two states away. We’re an owner-operated fuel services company based right here in Colorado. Our crews have pulled sludge out of tanks on construction sites, at agricultural operations, and inside critical hospital generator rooms across the Front Range. Louisville included. That hands-on experience means we know what contaminated fuel actually looks like at altitude, in winter, and after a summer of sitting unused.
There’s a reason microbial growth thrives in the temperature swings Louisville sees between July and January. Water intrusion through condensation accelerates faster than most equipment managers expect. By the time fuel looks dark or smells off, the tank walls may already be showing early corrosion. Our team comes equipped with vacuum truck capability and confined-space safety protocols. We assess not just what’s in the tank today. We find out why it got there and how to keep it from happening again.
Why Choose Us
Fuel Experts That Detect, Fix, and Prevent Fuel Contamination
We help businesses identify and solve fuel contamination. Whether it is due to years of buildup or a leaky seal, we have seen it all. We take the time to understand the cause and create a detailed plan for corrective and preventive care going forward.
Protect Your Equipment Investment
- Contaminated fuel accelerates injector wear, clogs filters, and causes premature pump failure
- A clean tank extends the service life of everything downstream like engines, generators, and hydraulic systems
- Preventive cleaning costs a fraction of a single major equipment repair
Stay Ahead of Regulatory Exposure
- Many industries face inspection requirements tied to fuel storage conditions
- Documented tank cleanings create an audit trail that demonstrates due diligence
- Environmental compliance risks drop significantly when tanks are maintained on a regular schedule
Maintain Fuel Quality Over Time
- Even fresh diesel degrades when stored in tanks with microbial contamination or water intrusion
- Clean tanks allow fuel additives and stabilizers to work as intended
- Consistent fuel quality means consistent equipment performance, season after season
Avoid Unplanned Downtime
- Equipment failures tied to fuel contamination almost never happen at a convenient time
- Scheduled tank cleaning puts you in control of your maintenance calendar
- Operators who clean tanks regularly report fewer emergency service calls and more predictable operational costs
Our Service Offering
Fleet Core Preventive Maintenance Services
We take a comprehensive approach to tank maintenance, leaving no detail overlooked:
Fuel Tank Inspections & Diagnostics
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Fuel Tank Inspections & Diagnostics
Evaluate sediment levels, tank structure, and surface seals to detect risks early.
Advanced water-testing paste locates moisture contamination before it affects performance.
Water, Sludge & Sediment Removal
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Water, Sludge & Sediment Removal
Safely extract contaminants and prevent corrosion and microbial growth for clean, reliable fuel flow.
Fuel Stabilization, Restoration & Filtering
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Fuel Stabilization, Restoration & Filtering
Add stabilizers to maintain fuel usability in long-term storage, preventing oxidation and degradation.
Detailed Compliance Reporting
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Detailed Compliance Reporting
Receive full documentation confirming your tanks meet regulatory and environmental requirements.
Why Regular Maintenance Matters
The Risks of Neglect
Leaving tanks unchecked invites risks no operation can afford:
- Contaminated Fuel: water and sludge lead to clogged filters, microbial growth, and fuel inefficiency.
- Corrosion Hazards: tank rust weakens structural integrity and increases the risk of leaks.
- Regulatory Trouble: outdated or degraded tanks can fail inspections and incur financial penalties.
Fleet Core tackles these risks head-on, so you can focus on running your business — not worrying about your fuel system.
How Often Should Tanks Be Maintained?
Stay proactive with a schedule designed for your tank type:
- High-Use Tanks (Generators and Fleet Systems): maintenance annually ensures reliability during critical times.
- Long-Term Storage Tanks: every 2–3 years, depending on environmental conditions, prevents sediment buildup and fuel degradation.
Speak with Fleet Core to create a maintenance plan customized to your operations.
Complete Fuel System Management for Colorado
Fuel Delivery
Clean Fuel Delivered On Your Schedule, Not Ours
After a tank cleaning, the last thing you want is a delivery of substandard diesel undoing the work. Fleet Core’s on-site fuel delivery brings fresh, quality-controlled diesel and gasoline directly to your location. And we schedule around your operation, not the other way around. Whether that’s a construction site off McCaslin or a fleet hub near the US-36 corridor, we show up on time with the fuel your equipment needs.
Diesel Fuel Testing
Know What’s in Your Tank Before Your Equipment Tells You the Hard Way
Fleet Core’s diesel fuel testing gives you a clear, data-backed picture of fuel quality. From microbial content, water presence, particulate levels, and more. We keep you informed so you’re making maintenance decisions on facts, not guesswork. Catching degraded fuel early is almost always cheaper than the injector cleaning, filter replacement, or engine repair that comes from running bad fuel too long.
Fuel Polishing
Recover Fuel You Already Paid For Before It Costs You Again
Fuel polishing runs contaminated diesel or gasoline through a multi-stage filtration process that strips out water, microbial colonies, and particulate matter. This process restores stored fuel to usable condition without the cost of disposal and replacement. When tank cleaning reveals recoverable fuel, polishing is often the smartest next step, turning a potential loss into a working asset.
Eco-Friendly Oil & Fuel Spill Cleanup
Fast, Effective Spill Response That Actually Works
Fuel handling means spills happen, and when they do, Petro Buster Petroleum Cleaner & Degreaser gives you a fast-acting, eco-forward response that breaks down petroleum residue on surfaces, equipment, and concrete without harsh chemistry that creates a second problem. It’s the kind of cleanup product that works as hard as the crews using it, and leaves a cleaner footprint behind.
Oil Analysis
Let Your Engine Oil Tell YouWhat’s Really Going on Under the Hood
Engine Oil Testing & Lubrication Analysis reads the microscopic evidence inside your oil. It can identify metal particles, viscosity breakdown, and contamination, translating it into clear maintenance intelligence for your vehicles and mission-critical equipment. For fleets, generators, and heavy machinery running around Louisville and the broader Boulder County area, regular oil analysis is how you catch a bearing problem in March instead of a full engine failure in July.
Who We Serve
Louisville Industries That Can’t Afford Fuel System Failures
Fleet Core serves a wide cross-section of Louisville and Boulder County operations that depend on stored fuel to keep moving. Our fuel storage tank cleaning work spans industries, equipment types, and operational rhythms. From seasonal agricultural operations east of town to healthcare facilities that can’t afford a generator hiccup during a winter storm, we’ve seen what contaminated tanks do to businesses that didn’t catch the problem in time. We bring the same owner-operated attention to a small fleet hub as we do to a multi-tank industrial site, and our service documentation supports the compliance needs of regulated industries without the runaround.
Facilities Management
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Facilities Management
Keep Power Online in Critical Moments
Backup generators cannot afford compromised fuel. Fleet Core ensures your emergency systems are always ready, protecting against failures during power outages or generator tests.
Environmental Compliance Management
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Environmental Compliance Management
Achieve Total Regulatory Compliance
Avoid costly penalties with tank cleaning services designed to meet eco-standards. Our process ensures environmentally responsible waste handling, giving you full confidence in your compliance.
Fleet Management
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Fleet Management
Protect Uptime for Fleets
Contaminated fuel leads to downtime and disrupted schedules. Fleet Core keeps your fuel systems clean, so your vehicles stay on the road and revenue stays steady.
Construction Site Management
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Construction Site Management
Prevent Project Delays
Dirty tanks damage equipment and derail timelines. Fleet Core ensures your heavy machinery operates reliably under demanding conditions.
Testimonials
Our Commitment To Excellence
Fleet Core is more than just a fuel and fluid provider — we are your comprehensive ENERGY PARTNER supporting operational reliability, productivity, and sustainability.
“Great company and great service!! Employees are well trained and very professional!!”
“Fleet Core offers excellent customer service. They complete the commitments they make and take care of their clients.”
“Great Diesel and Service. Extremely low temps and Core Power didn’t let me down. I would recommend Fleet Core and Core Power diesel to anyone in the Denver area.”
“Quick and efficient on-site fuel delivery.”