
- Early Detection of Contamination
- Fuel Performance Verification
- Meets Regulatory Compliance
- Prevents Costly Breakdowns

Commerce City’s Trusted Partner for Fuel Quality Management
Fleet Core understands what’s at stake when fuel quality drops in Commerce City. We’ve worked with logistics operations running 24/7 schedules and medical facilities where backup power isn’t optional, it’s life-critical. Our testing protocols go beyond basic pass/fail results. We provide actionable data with clear recommendations, whether that means immediate polishing, additive treatment, or simply confirming your fuel storage practices are working as intended.
You know what? Most fuel problems don’t announce themselves until it’s too late. A hospital generator that won’t start during a storm outage. A delivery truck that loses power on I-70 with a time-sensitive load. These situations are preventable with consistent testing. Our lab analysis examines multiple factors, including particulate count, water content, microbial presence, fuel stability. And we deliver results quickly because we know you’re making decisions based on what we find.
Why Choose Us
Complete Fuel Management, For Commerce City Operations
Fleet Core doesn’t just test your diesel, we manage every aspect of your fuel health and operations. Whether you need scheduled fuel polishing, emergency diesel delivery, fuel storage tank cleaning, or ongoing monitoring, we handle it all. This integrated approach means your fuel stays reliable, your equipment stays protected, and your operations stay on track. You get one trusted partner instead of juggling multiple vendors.
Fuel Delivery
Reliable Supply When and Where You Need It
On-site fuel delivery keeps your fleet fueled without drivers leaving the yard or generators topped off for emergency readiness. We schedule deliveries around your operations, early morning for fleet fueling, priority service before storm season for backup systems, with transparent tracking and billing by vehicle or location.


Fuel Polishing
Remove Contaminants and Restore Fuel Quality
Fuel polishing removes water, sludge, and microbial contamination from stored diesel, extending its usable life and preventing equipment damage. Our mobile polishing units work on-site, filtering fuel through multiple stages to return it to specification without the cost and hassle of disposal.
Tank Cleaning
A Reliable Direct Supply When and Where You Need It Most
On-site fuel delivery keeps your fleet fueled without drivers leaving the yard or generators topped off for emergency readiness. We schedule deliveries around your operations, early morning for fleet fueling, priority service before storm season for backup systems, with transparent tracking and billing by vehicle or location.


Spill Cleanup
Keep it On-Hand for Fast Response to Spills and Accidents
Petro Buster handles petroleum spills quickly, breaking down oil and fuel contamination without harsh chemicals or lengthy cleanup procedures. Whether it’s a minor leak during refueling or a larger incident requiring documentation, our petroleum cleaner meets environmental standards while getting your facility back to normal operations fast.
Oil Analysis
Identify Breakdowns BEFORE They Happen
Knowing what is going on in your engine can be the difference between a successful delivery and a thousand-dollar tow. Our expert oil analysis can help you spot an issue before it leaves you broken down by the side of the road.

Who We Serve
Built for Energy Reliant Businesses
Commerce City diesel fuel testing supports the operations that keep the Front Range moving and safe. Whether you’re coordinating deliveries across multiple states or managing backup power for critical facilities, fuel quality directly impacts your ability to deliver on commitments. We work with fleet coordinators who need every truck reliable and facility managers who answer to regulators and the public when systems fail.

Fleet Management
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Fleet Management
Your Challenge
Ensuring optimal fleet uptime and performance without disruptions and escalated costs
Our Solution
Reliable delivery and clean, high-performance lubricants and fluids that minimize wear, reduce sludge, meet regulatory guidelines, and keep your fleet running smoothly

Construction Site Management
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Construction Site Management
Your Challenge
Managing remote sites, with rigorous timelines, requiring uninterrupted fuel-dependent operations, needing multiple essential fluids solutions
Our Solution
Integrated essential fluids offerings aligned to site schedules, equipment needs, operational demands, and budget requirements

Project Management
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Project Management
Your Challenge
Managing tight timelines, defined budgets, environmental regulations, safety requirements, and performance expectations
Our Solution
Flexible, on-site delivery options, integrated essential fluids solutions, and cost-effective performance-enhancing products
Our Value
Confidence. Control. Continuity.
Protect Your Equipment With Our Essential Fluid Services
Fuel testing isn’t glamorous, honestly. It’s lab work and data interpretation. But it’s also the difference between knowing your fuel is good and hoping it won’t fail when you need it most. Fleet Core treats every sample like it matters—because to you, it does. Your trucks, your generators, your operations depend on fuel that performs consistently.
We’ve seen what contaminated fuel does to operations. The invoice for replacing damaged injectors across a fleet. The scramble when hospital generators won’t start during an outage. The regulatory scrutiny after a compliance failure. Testing catches these issues early, when they’re manageable problems instead of operational crises.

Lubrication
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Lubrication
- Lubricate engine components
- Minimize friction
- Prevent damage from metal-on-metal contact

Cooling
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Cooling
- Cool engines
- Absorb heat
- Prevent breakdown and failure

Washer Fluid
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Washer Fluid
- Crystal clear operator vision
- Vehicle safety
- Winter operations protection

Emissions Compliance & Performance
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Emissions Compliance & Performance
- Improve performance
- Eliminate smog and illness
- Maintain regulatory compliance
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.”