- 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
Your Trusted Energy Partner for Fuel Delivery and Management
You know what sets Fleet Core apart in the Golden market? We’re not just another fuel truck rolling through town. Our owner-operated approach means every delivery matters to us personally, and that shows in how we handle everything from routine scheduled fills to those middle-of-the-night emergency calls that can make or break a project timeline.
We’ve built our reputation by understanding Colorado’s unique operational challenges. From altitude considerations that affect fuel performance to weather patterns that can shut down mountain passes, our local expertise keeps your operations ahead of potential disruptions. That’s why construction managers, fleet coordinators, and facility operators throughout Jefferson County rely on us for solutions that actually work in real-world conditions.
Complete Fuel and Fluid Solutions for Colorado Fleets and Businesses
Fuel Delivery
On-Site Fuel That Eliminates Downtime and Delays
Our mobile fuel delivery brings premium diesel, gasoline, and off-road fuel directly to your Golden location, saving valuable time and preventing costly equipment shutdowns. You’ll get competitive pricing with no middleman markups, just reliable fuel when and where you need it most.
Diesel Fuel Testing
Advanced Fuel Quality Analysis That Prevents Expensive Equipment Damage
Regular diesel fuel testing catches contamination issues before they destroy injection systems or clog filters in your valuable machinery. Our comprehensive analysis identifies water contamination, microbial growth, and fuel degradation – protecting your investment and maintaining peak performance.
Fuel Polishing
Professional Fuel Conditioning That Extends Storage Life and Equipment Reliability
Fuel polishing removes water, sediment, and contaminants that naturally accumulate in stored fuel, preventing fuel system failures and costly repairs. This process keeps your stored diesel in optimal condition, whether it’s powering generators during Colorado’s unpredictable weather or fueling heavy equipment through demanding construction seasons.
Tank Cleaning
Part of Our Fuel Maintenance Program to
Keep Your Fleet Running
Professional fuel storage tank cleaning eliminates sludge buildup, water contamination, and debris that compromise fuel quality and system reliability. Our thorough cleaning process restores tank integrity and prevents fuel degradation issues that can sideline critical equipment during peak operational periods.
Spill Cleanup
Fast-Acting Petro Buster for Oil and Fuel Spill Remediation
Petro Buster petroleum cleaner tackles oil spills and fuel contamination quickly and effectively, meeting environmental compliance requirements while protecting your worksite. This biodegradable solution breaks down petroleum residues without harsh chemicals, making cleanup faster and safer for your crew and the surrounding Golden environment.
Oil Analysis
Comprehensive Engine Oil Testing That Maximizes Fleet and Generator Lifespan
Oil analysis reveals exactly what’s happening inside your engines before expensive failures occur, extending equipment life and preventing unexpected downtime. Regular testing identifies wear patterns, contamination issues, and optimal oil change intervals – saving money on both maintenance costs and premature equipment replacement throughout your Golden operations.
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.”