- 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
Keeping Your Construction Equipment Fueled and Your Jobsites Running
Your excavators, skid steers, and haul trucks run hard in tough conditions. Bad weather, long shifts, and tight schedules don’t leave room for fuel problems.
That is where Fleet Core comes in.
We deliver off-road diesel direct to your job site or equipment yard. When you call us, you’re talking to the people who own the trucks and pump the fuel. That means faster response times, honest pricing, and a supplier who shows up when we say we will.
But delivery is only part of it. The fuel itself matters.
Every gallon we deliver is treated with CorePower premium diesel additives. CorePower is engineered to push your equipment harder and last longer between service intervals. It cleans injectors, improves combustion efficiency, and reduces the carbon buildup that quietly robs your machines of power over time. On a Denver job site — where altitude already stresses diesel performance — that edge adds up fast.
Our customers keep coming back because their equipment runs better. Fewer hard starts on cold mornings. Less black smoke under load. Engines that hit their service intervals without surprises. That’s not an accident. That’s what happens when you stop treating fuel like a commodity and start managing it like an asset.
From direct delivery of red diesel to full fuel management and tank maintenance, Fleet Core keeps your operation moving.
Why Choose Us
Why Denver Fleet Managers Depend on Fleet Core for Fuel Delivery
Fleet Core delivers premium diesel fuel and gasoline directly to your facility. Cleaner, better quality fuel means less operational headaches for your operations and less downtime for your team.
Save Time and Money
- Eliminate station detours, optimally fueling your fleet while your drivers remain ready for the road.
- Prioritize routes and operations, avoiding lost productivity and unnecessary fuel station trips.
Improved Fleet Performance
- Direct onsite fueling ensures every vehicle is ready to perform as scheduled.
- Reduce wear and tear caused by extra travel to off-site fueling locations.
- Fuel health management systems can complement your delivery service.
Data-Driven Fuel Management
Advanced fuel tracking and transparent reporting optimize usage, helping you better monitor expenses.
Cost Effective Oil Spill Cleaner
- Our fuel is sourced from top suppliers to ensure clear, high-efficiency diesel that protects engines and maximizes operational output.
- Certified professionals meet and exceed OSHA and EPA standards for clean, secure, and responsible fueling.
- Spill-resistant, state-of-the-art equipment enables safe operation in industrial and urban hubs alike.
Your One-Stop Shop for All Things Fuel and Lubricants
Diesel Fuel Testing
Know Your Fuel Quality Before Problems Start
Professional diesel fuel testing identifies contamination levels, water content, and microbial growth before they damage your equipment. Our comprehensive analysis gives you the data needed to make informed decisions about fuel treatment and replacement schedules.
Fuel Polishing
Restore Fuel Quality & Protect Emergency Equipment.
Ensure peak performance of your generators and emergency equipment with professional fuel polishing services. Remove water, sludge, and microbial growth to restore fuel quality and prevent costly downtime.
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
Accidents Happen, Eco-Friendly Cleaning Solutions
Ensure peak performance of your generators and emergency equipment with professional fuel polishing services. Remove water, sludge, and microbial growth to restore fuel quality and prevent costly downtime.
Oil Analysis
Identify Breakdowns BEFORE They Happen
Detect early signs of engine wear and contamination with precision oil analysis. Gain insights that help you prevent costly breakdowns and extend the life of your fleet.
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.”