- 24/7 Emergency & Scheduled Fuel and Fluid Services
- Guaranteed Quality of CorePower Premium Diesel Fuel
- Real-time Delivery Updates and Transparent Billing
- Integrated Fuel Services – Run, Store, Manage
Why Commerce City Businesses Trust Fleet Core’s Fuel Expertise
You know what sets apart a reliable fuel partner from just another vendor? It’s the difference between reactive fixes and preventive solutions. Fleet Core has built its reputation across Colorado by understanding that your fuel system isn’t just about what’s in the tank, it’s about the entire ecosystem that keeps your business moving. Our owner-operated approach means we’re personally invested in your success, not just completing another delivery.
When you’re managing a construction site or running a fleet operation, downtime isn’t just inconvenient—it’s expensive. That’s why we’ve developed integrated fuel management programs that address every aspect of your energy needs. From emergency diesel delivery during those unexpected Colorado weather events to routine tank maintenance that prevents contamination, we’re the Energy Partner that anticipates problems before they become crises.
Complete Fuel Solutions: Storage, Delivery, Testing & Maintenance
Fuel Delivery
Delivery That Works Around Your Schedule
Professional fuel delivery eliminates downtime and keeps your operation running smoothly. Our mobile fuel trucks deliver premium diesel, gasoline, and off-road fuel directly to your equipment. No more sending crews across town to fill up tanks.
Diesel Fuel Testing
Clean Fuel Means Reliable Equipment Performance
Fuel polishing removes water, sludge, and contaminants that accumulate in storage tanks over time, restoring fuel to specification standards. This preventive service eliminates the root causes of fuel system failures and ensures your backup generators start when you need them most.
Fuel Polishing
Professional Tank Maintenance for Maximum Fuel Integrity
Our diesel storage tank cleaning service removes accumulated sludge, water, and debris that compromise fuel quality and equipment performance. Clean tanks prevent costly fuel contamination issues and maintain compliance with environmental regulations.
Tank Cleaning
Prevent Recontamination of Your Mission Critical Fuel
Keep your fuel system clean and efficient with expert tank cleaning services. Eliminate sludge and buildup to prevent recontamination and ensure uninterrupted equipment performance.
Spill Cleanup
Petro Buster: Your Solution for Safe Spill Management
When oil and fuel spills happen, and they do, Petro Buster petroleum cleaner provides fast, effective cleanup that’s safe for workers and the environment. This heavy-duty degreaser handles everything from minor equipment leaks to major spill situations with professional-grade results.
Oil Analysis
Data-Driven Maintenance for Fleet and Generator Longevity
Oil analysis testing reveals engine wear patterns, contamination levels, and maintenance needs before catastrophic failures occur. Regular lubricant analysis extends equipment life, reduces unplanned downtime, and optimizes maintenance schedules based on actual operating conditions rather than guesswork.
Who We Serve
Operational Leaders Depend on Fleet Core’s Essential Fluid Services
To run seamlessly, vehicles and equipment require high performance fluids, regular maintenance, and periodic testing.
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 — Fleet Core 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.”