- Early Detection of Contamination
- Stay in Compliance with Industry and Manufacturer Standards
- Save Time and Money Through Prevention
- Real-Time Data & Transparent Reporting
Fleet Core’s Expertise in Diesel Fuel Testing
We’ve spent years understanding what Aurora-area fleet managers and facility operators face: the constant pressure to keep vehicles and critical systems running without interruption. Diesel fuel quality isn’t something you can guess about, it demands precision, reliability, and technical know-how. That’s exactly why Fleet Core invested in advanced laboratory capabilities and field testing protocols. Our team doesn’t just run tests; we interpret results in a way that actually makes sense for your operation, translating technical data into actionable decisions you can implement immediately.
When your diesel fuel shows signs of degradation, microbial growth, or water infiltration, you need a partner who catches these issues early. We’ve helped hundreds of Aurora fleet operations avoid catastrophic equipment failures through systematic, thorough fuel testing. Our approach combines industry-standard methodologies with practical insights born from years of working directly with transportation fleets, construction sites, and medical facilities across Colorado. You’re not working with a generic lab, you’re partnering with specialists who understand your specific challenges and can provide solutions to the problems that you face.
Why Choose Us
Complete Fuel Management, From Testing Through Delivery
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 Local Supplier of High Quality Diesel and Gasoline
Why haul your fleet to gas stations or order through a national broker with a luck-of-the-draw supplier when you can get clean, tested fuel sent directly to you? Fleet Core’s on-site fuel delivery eliminates lost productivity, reduces driver hours spent refueling, and ensures your vehicles and generators are ready whenever you need them. And when you order from us, you know exactly who is providing the fuel and when you will get it. Scheduled or emergency—we deliver what you need, when you need it.
Fuel Polishing
Remove Contamination
and Protect Your Investment
Fuel polishing goes beyond testing by actively cleaning your diesel of water, microbial growth, and particulates that accumulate over time. Think of it as preventative maintenance for your fuel supply—keeping everything pure so your engines run smoothly and your downtime disappears. This process extends equipment lifespan and maintains the performance your fleet depends on.
Tank Cleaning
Remove Sludge, Rust, and Debris Before They Damage Your Equipment
Over time, diesel storage tanks accumulate sediment, rust, and bacterial growth that compromise fuel quality and corrode tank interiors. Professional tank cleaning removes these threats, protecting your storage investment and ensuring the fuel you store stays ready to use. Regular cleaning prevents costly equipment damage and keeps your fuel fresh for months or years.
Spill Cleanup
Eco-Friendly Oil & Fuel Cleanup: Handle Spills Responsibly with Petro Buster
Equipment accidents happen, and when they do, Petro Buster Petroleum Cleaner & Degreaser provides fast, effective cleanup that won’t damage the environment or your reputation. Our eco-forward approach removes oil stains, fuel residue, and grease from parking areas, workshops, and concrete surfaces. Stay compliant with environmental standards while keeping your facilities clean and professional.
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
Energy Reliant Businesses That Can’t Afford Fuel-Related Delays
Managing large vehicle fleets across the Denver metro demands the confidence that your diesel is clean and fuel management is efficient. Overseeing backup generators for healthcare facilities means contaminated fuel could compromise critical care during emergencies. These aren’t hypothetical concerns. They’re the daily reality for Aurora’s fleet operations and critical infrastructure managers. Fleet Core’s diesel fuel testing in Aurora serves professionals who depend on absolute reliability.
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
Colorado businesses demand high performance and Fleet Core’s Essential Fluid Services support dynamic operational conditions.
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.”