
- State-of-the-art cleaning technology for thorough results
- Experienced technicians trained in safety and compliance
- Flexible scheduling to minimize disruption to your operations
- Comprehensive fuel testing and analysis

Lakewood’s Fuel Tank Maintenance Experts
Fleet Core brings owner-operated precision to every tank cleaning job in Lakewood. We’ve seen what happens when businesses treat fuel storage as “set it and forget it”—the catastrophic injector failures, the fleet-wide breakdowns, the emergency calls at 2 AM because half your equipment won’t start. Our team doesn’t just pump out tanks and call it done. We use systematic inspection protocols, specialized filtration equipment, and documented cleaning processes that actually address the root causes of fuel contamination.
Here’s the thing about Lakewood’s location along the Front Range: altitude, temperature swings, and seasonal moisture all accelerate fuel degradation in storage. That morning condensation in your tanks? It’s creating the perfect environment for microbial growth right now. The dust from construction sites and industrial operations? It’s settling into every vent and fill point. We’ve spent years learning how local conditions impact fuel storage systems, and that knowledge shows up in how we approach every cleaning job.
Why Choose Us
Fuel Experts That Have Built Our Reputation on Reliability and Quality

Fleet Core handles fuel storage tank cleaning with the seriousness it deserves. Because we’ve seen the real costs when businesses cut corners. Equipment failures cost you more than repair bills; they cost you project delays, customer trust, and competitive advantage.
Comprehensive Contamination Removal
- Complete tank draining and vacuum extraction of sludge and sediment
- Removal of water accumulation that promotes microbial growth
- Interior surface cleaning to eliminate biofilm and bacterial colonies
Detailed System Assessment
- Pre-cleaning inspection to identify corrosion, leaks, and structural concerns
- Post-cleaning fuel quality testing and system evaluation
- Documented reporting for compliance and maintenance records
Preventative Maintenance Programs
- Customized cleaning schedules based on your fuel usage and storage conditions
- Ongoing monitoring to catch contamination issues early
- Winter preparation services to prevent gelling and wax formation
Transparent Service Delivery
- Upfront pricing with no hidden fees or surprise charges
- Flexible scheduling including emergency response for critical contamination
- Same team consistency, you work with people who know your systems
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 Lakewood Operations
Fuel Delivery
Fresh, Clean Fuel Delivered When and Where You Need It
Reliable diesel and gasoline delivery to Lakewood job sites, facilities, and equipment yards means you’re not racing to gas stations or dealing with contaminated retail fuel. We deliver tested, treated fuel that meets your equipment manufacturer specifications, with scheduling that adapts to your operational reality instead of forcing you to adapt to ours.


Diesel Fuel Testing
Know What You’re Putting in Your Equipment Before It’s Too Late
Laboratory fuel analysis identifies contamination levels, water content, particulate concentrations, and microbial growth before they cause equipment failures. Testing after tank cleaning provides documented proof that your fuel meets specifications. And is VERY useful for warranty claims, insurance requirements, and just knowing you’re not about to wreck a $50,000 engine with bad fuel.
Fuel Polishing
Remove Contaminants With a Thorough Cleaning Process
Fuel can become contaminated. A leaky cap, an accidental over-treatment, improper fueling procedures, we have seen it all. Fortunately, our mobile fuel polishing service can come to your rescue. Our fuel polishing systems filter stored fuel through multi-stage filtration that captures water, particulates, and microbial contamination without the downtime of complete tank draining. You keep your fuel, just make it cleaner.


Eco-Friendly Oil & Fuel Spill Cleanup
Fast-Acting Solutions for Petroleum Spills and Equipment Leaks
Petro Buster petroleum cleaner breaks down oil and fuel contamination on concrete, asphalt, and equipment surfaces without the harsh chemicals that create new environmental problems. Tank cleaning sometimes reveals leaks or historical spills. With Petro Buster, we help you address those issues quickly and responsibly before they become regulatory nightmares.
Oil Analysis
Catch Equipment Problems Before They Become Equipment Failures
Engine oil testing reveals wear metals, contamination, and oil degradation that signal developing problems in vehicles and critical machinery. The patterns we see in oil analysis can help us identify issues in specific equipment or system-wide.

Who We Serve
Lakewood Businesses That Can’t Afford Fuel-Related Downtime
Fuel storage tank cleaning in Lakewood supports construction operations, transportation fleets, manufacturing facilities, and backup power systems where equipment reliability directly impacts revenue. When your excavators won’t start because contaminated diesel destroyed their injection systems, or your emergency generators fail during their quarterly test because the stored fuel turned to sludge, you don’t have time for a service provider who treats this like a routine pump-out job.

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.”