The Benefits of Fuel Polishing are Easy to See
- Removes Water & Sediment
- Prevent Microbial Growth
- Extends Fuel Storage Life
- Prevent Costly Repairs and Downtime
Your Golden Fuel Quality Experts
Fleet Core understands what happens when fuel sits too long in storage tanks across Golden’s varied terrain, from construction yards up near Lookout Mountain to fleet operations down by the Coors plant. Temperature swings, condensation, and time itself turn clean diesel into a contaminated mess. We’ve seen it countless times: generators that won’t start during power outages, backup systems failing when hospitals need them, construction equipment grinding to a halt because someone ignored their fuel quality for too long.
That’s why we built our fuel polishing program around prevention rather than panic. Our mobile units come to your Golden location, whether you’re managing a fleet near the Golden Triangle or running heavy equipment on a job site off Highway 93. We test, filter, and restore your fuel right where it sits. No need to drain tanks, no downtime waiting for new fuel deliveries, no wondering if your equipment will start when you turn the key.
Why Choose Us
We Understand What Clean Fuel Means for Your Business
The Experience to Handle Every Contamination Challenge
We’ve worked with Golden operations long enough to know that contaminated fuel isn’t just an inconvenience—it’s expensive downtime, failed equipment, and missed deadlines. Our owner-operated commitment means we show up when scheduled, do the work right, and stand behind our results.
Prevent Equipment Damage and Expensive Repairs
- Remove abrasive particles before they score cylinder walls
- Eliminate water that causes rust and corrosion throughout fuel systems
- Stop microbial growth that creates acids attacking tank walls and fuel lines
Maintain Fuel Quality During Long-Term Storage
- Keep backup generator fuel fresh for years instead of months
- Preserve diesel quality through Colorado’s temperature extremes
- Prevent fuel degradation that drops cetane ratings and reduces power
Ensure Compliance and Operational Readiness
- Meet fuel quality standards for critical infrastructure and emergency systems
- Maintain generator readiness for hospitals and data centers
- Document fuel condition for regulatory inspections and insurance requirements
Cost-Effective Alternative to Fuel Replacement
- Restore contaminated fuel instead of disposing thousands of gallons
- Eliminate hazardous waste handling and disposal fees
- Extend usable fuel life with regular polishing schedules
Clean Fuel Clear Advantage
Energy Confidence Through Smart Prevention
Here’s what separates us from other vendors who just show up with a truck: we treat fuel health as an integrated part of your operational strategy, not a one-time fix. Our fuel polishing programs in Lakewood, CO, combine regular testing, scheduled maintenance, and emergency response. Because preventing contamination costs less than recovering from it. We know the construction manager who needs generators running through night pours doesn’t care about our filtration specs; they care about equipment that starts every single time.
That’s why every program starts with an assessment of your fuel storage conditions. We look at tank age, fuel turnover rates, storage environment, and contamination history. We then build a maintenance schedule that makes sense for your operation and your budget. No hidden costs, no surprise failures, just clean fuel and continuous operations backed by a Colorado team that’s as invested in your uptime as you are.
Complete Energy Solutions for Golden Operations
Fuel Delivery
On-Site Fueling That Keeps You Operating
Why waste time sending drivers to gas stations when we’ll bring bulk diesel, gasoline, or DEF straight to your Golden location? Our scheduled delivery programs mean your tanks stay full, your fleet keeps moving, and you’re never scrambling for emergency fuel when you need it most.
Diesel Fuel Testing
Are You Experience Fuel System Breakdowns? The Problems Can Start at the Source.
Regular fuel testing catches contamination before it damages your fleet. We analyze samples for water content, microbial growth, particulate levels, and fuel stability, then tell you exactly what needs fixing. It’s way cheaper than replacing injectors or rebuilding fuel systems after bad fuel destroys them.
Tank Cleaning
Deep Cleaning for Seriously Contaminated Storage
Sometimes polishing isn’t enough. Heavily contaminated tanks need complete cleaning to remove years of accumulated sludge, scale, and bacterial growth. Our vacuum truck services pull out every bit of contamination, leaving your storage tanks clean and ready for fresh fuel. Regular tank cleaning prevents the fuel quality issues that polishing has to fix.
Eco-Friendly Oil & Fuel Spill Cleanup
Be Ready for Fast Response with Petro Buster
Even with the best practices and policies, spills can happen. This is especially true around busy equipment yards and fueling stations. Petro Buster petroleum cleaner breaks down oil and diesel contamination fast, without harsh chemicals that damage surfaces or harm the environment. One application handles what used to take multiple cleanup attempts with inferior products.
Oil Analysis
The Crystal Ball for Mission-Critical Equipment
Oil analysis reveals what’s happening inside your engines and hydraulic systems. Elevated metal content signals bearing wear, fuel dilution warns of injector problems, and viscosity changes show when oil’s breaking down. We test samples from your vehicles and mission-critical equipment, then provide detailed reports showing exactly what maintenance you need and what can wait.
Who We Serve
Your Colorado Energy Partner for Critical Fuel Dependent Operations
From construction sites building new developments along Washington Avenue to the fleet operations supporting Golden’s industrial corridor, we handle fuel and fluid management for businesses that can’t afford downtime. Our mobile services reach every Golden location. Whether you’re up in the foothills running mining equipment or managing a municipal fleet down near the Parfet Water Treatment Plant. Emergency fuel polishing responds 24/7 when contamination strikes at the worst moment.
Construction Site Management
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Construction Site Management
Reduce Delays
Heavy-duty equipment depends on clean fuel to operate under pressure. Fleet Core ensures tank cleanliness for optimal machine productivity.
Facilities Management
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Facilities Management
Prevent Backup Power Failures
Secure emergency generator fuel with proactive, clean solutions ensuring readiness during outages.
Fleet Management
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Fleet Management
Minimize Downtime
Clean fuel ensures vehicles stay on the road, shrinking repair costs while maximizing uptime.
Emergency Response Management
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Emergency Response Management
Dependability Under Pressure
Keep critical systems fueled with clean tanks that ensure availability when it matters most.
Environmental Compliance Management
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Environmental Compliance Management
Exceed Regulatory Standards
Avoid fines and reputational risks with certified maintenance that protects your tanks and the environment.
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.”