
- Sub-micron Fuel Filtration
- Remove Water, Sludge, and Other Contaminants
- Maximize Fuel Economy and Performance
- Preventive Maintenance That Saves Time and Money

Your Partner in Fuel Integrity and Confidence
Fleet Core understands that contaminated fuel doesn’t just cost money—it threatens your operational continuity. We’ve spent years helping Aurora-based construction managers, fleet directors, facility operators, and agricultural producers keep their fuel systems pristine. Our fuel polishing expertise goes beyond surface-level cleaning; we’re addressing the root causes of fuel degradation that most suppliers overlook.
We know Aurora’s climate creates unique challenges for fuel storage. Temperature swings, humidity levels, and seasonal variations all contribute to contamination buildup in ways that generic fuel suppliers simply don’t account for. That’s why our approach combines cutting-edge polishing technology with a deep understanding of how your specific equipment and storage systems operate under these regional conditions.
Why Choose Us
Aurora’s Most Trusted Fuel Specialists

The Experience to Handle Every Contamination Challenge
Fleet Core has earned a reputation for delivering fuel solutions that actually work, backed by owner-operator commitment and transparent service. We understand Aurora operations because we work with them every single day – construction sites, hospitals, fleet operations, and farms across the region trust us with their fuel integrity.
Key Benefits of Professional Fuel Storage Tank Cleaning:
Eliminates Repeat Contamination Issues
- Removes the source of microbial growth and rust particles that keep recontaminating fresh fuel
- Provides a clean slate for storage systems that have struggled with quality problems
- Prevents the frustrating cycle of delivering clean fuel into dirty tanks
Restores Tank Capacity and Flow
- Sludge and sediment buildup reduce usable tank volume and impede fuel movement
- Professional cleaning restores full storage capacity and faster delivery rates
- Improves system efficiency without tank replacement costs
Extends Equipment Life and Reduces Repairs
- Clean tanks mean clean fuel, which means less wear on engines, generators, and fuel injectors
- Prevents expensive downtime caused by contaminated fuel failures
- Keeps your Aurora operations running at peak performance
Ensures Compliance and Safety
- Removes hazardous contamination that violates storage regulations
- Protects groundwater and meets environmental standards
- Provides documentation for facility inspections and compliance audits
Clean Fuel Clear Advantage
Proactive Care for Peak Performance
You know what they say, an ounce of prevention is worth a pound of cure. Well, in the world of fuel, a gallon of polished fuel is worth a truckload of repairs. Our Denver fuel polishing service doesn’t just clean; it protects, preserves, and prolongs the life of your engines and fuel systems.
Think of us as your fuel’s personal trainer, keeping it in top shape so your equipment can flex its muscles when you need it most. Isn’t it time you gave your fuel the TLC it deserves?

Services Designed to Prevent and Identify Breakdowns Before They Happen

Fuel Delivery
Fresh, Premium Fuel Without the Middleman
Having clean fuel delivered right to your site eliminates the need for time-consuming trips to commercial stations and keeps equipment running without delays. Whether you’re managing a construction project timeline or maintaining essential backup systems, we deliver fuel that’s already tested and verified for quality.
You won’t waste hours coordinating refueling runs or worry about showing up with contaminated fuel that creates more problems than it solves.
Diesel Fuel Testing
Quality Assurance Through Comprehensive Fuel Analysis
Testing fuel quality before it enters your critical systems prevents costly failures and compliance issues down the line. Fleet Core’s testing identifies water content, microbial contamination, particle count, and degradation markers, giving you complete visibility into fuel condition.
When you know your fuel is clean before it reaches your generators, vehicles, or equipment, you’ve eliminated a major source of unexpected downtime.


Tank Cleaning
Start Fresh with Professional Diesel Storage Tank Cleaning
Storage tank cleaning removes the sludge, rust, water, and microbial buildup that polishing alone can’t address. When tanks develop serious contamination, professional cleaning is the reset button—restoring them to like-new fuel-holding capacity.
Eco-Friendly Oil & Fuel Spill Cleanup
Petro Buster: Fast, Effective Cleanup for Petroleum Spills and Contamination
Petro Buster Petroleum Cleaner & Degreaser breaks down petroleum residue, oil stains, and fuel spills safely and effectively—protecting both your equipment and the environment. Aurora facilities dealing with accidental spills or routine equipment maintenance appreciate having a dependable, eco-conscious solution on hand.
From minor drips to larger cleanup situations, this heavy-duty degreaser handles the mess without compromising environmental standards or leaving stubborn residue behind.


Oil Analysis
A Crystal Ball For Your Engine’s Health
Engine oil analysis reveals what’s actually happening inside your vehicles and mission-critical machinery—catching early wear, contamination, or system issues before they become expensive repairs. This preventative insight helps you plan maintenance strategically rather than reactively.
Who We Serve
From Construction Sites to Critical Infrastructure, We’ve Got Your Fuel Covered
Aurora businesses depend on us because fuel reliability isn’t negotiable in their industries. Construction managers can’t afford project delays from fuel contamination. Fleet coordinators can’t accept vehicle breakdowns from bad fuel. Hospitals need backup power systems that actually work. We serve them all with the same commitment: keep your fuel clean, keep your operations running.
When you’re looking for fuel polishing service in Aurora that understands your specific challenges, Fleet Core delivers expertise every single time. Our team knows the regional climate factors affecting your storage tanks and the unique demands your equipment places on fuel quality.

Construction Site Management
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Construction Site Management
Reduce Delays
Heavy-duty equipment depends on clean fuel to operate under pressure. Fleet Core ensures tank cleanliness for optimal machine productivity.

Facilities Management
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Facilities Management
Prevent Backup Power Failures
Secure emergency generator fuel with proactive, clean solutions ensuring readiness during outages.

Fleet Management
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Fleet Management
Minimize Downtime
Clean fuel ensures vehicles stay on the road, shrinking repair costs while maximizing uptime.

Emergency Response Management
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Emergency Response Management
Dependability Under Pressure
Keep critical systems fueled with clean tanks that ensure availability when it matters most.

Environmental Compliance Management
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Environmental Compliance Management
Exceed Regulatory Standards
Avoid fines and reputational risks with certified maintenance that protects your tanks and the environment.
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.”