
Why Smart Businesses Get Their Fuel Tested
- Early Detection of Contamination
- Fuel Performance Verification
- Maintenance Optimization
- Prevents Costly Breakdowns

We Know Fuel Chemistry Because We Live It Every Day
Fleet Core’s fuel testing program connects you directly with the same laboratory partnerships we rely on for our own fuel polishing and delivery operations. We’re not just ordering tests and forwarding results. We interpret the data through the lens of real operational experience with Lakewood’s altitude, temperature swings, and industrial fuel storage challenges. When your test results come back showing elevated particulate counts or water phase separation, we’re already thinking three steps ahead about whether you need immediate polishing, scheduled tank cleaning, or just adjusted storage practices.
What makes our testing different is the consultation that comes with it. You’re not getting a lab report dropped in your inbox with no context. We walk through what the numbers mean for your specific equipment, your fuel turnover rates, and your operational risks. That hospital facility manager worried about backup generator reliability? We’re translating cetane numbers and microbial counts into “your generators will start when you need them” or “we need to address this before winter.” It’s the difference between data and actionable intelligence.
Why Choose Us
Complete Energy Partner For Lakewood Operations
Beyond testing, Fleet Core manages every aspect of your fuel systems. From delivery schedules that prevent long-term storage degradation to polishing services that rescue contaminated fuel to tank cleaning that eliminates the source of recurring problems. Testing becomes your diagnostic tool within a comprehensive maintenance strategy, not an isolated service you’re coordinating with multiple vendors.
Fuel Delivery
Fresh Fuel Delivered on Your Schedule
Scheduled diesel delivery to your Lakewood facilities ensures fuel turnover that naturally prevents the degradation issues testing would otherwise identify. We coordinate delivery timing with your consumption patterns, so you’re always running fresh fuel through equipment.


Fuel Polishing
Clean Fuel On Demand Without Tank Replacement
Our mobile fuel polishing removes water, sludge, and contaminants directly at your Lakewood location, restoring fuel quality to specification without the expense and hassle of disposal and replacement. Testing before and after polishing proves the fuel’s ready for critical use.
Tank Cleaning
Eliminate Contamination at the Source
Professional fuel storage tank cleaning removes the accumulated sludge, water, and microbial colonies that testing keeps identifying cycle after cycle. We’re getting to the root cause instead of treating symptoms, giving you genuinely clean fuel storage that stays clean longer.


Petro-Buster
Keep it On-Hand for Fast Response to Spills and Contamination
Petro Buster petroleum cleaner tackles fuel spills, equipment leaks, and contaminated surfaces with a biodegradable formula that works fast without harsh chemicals. Whether it’s a generator room spill or vehicle maintenance area cleanup, you’re handling problems responsibly and effectively.
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
Critical Operations That Can’t Afford Fuel Failures
Lakewood’s concentration of healthcare facilities, transportation fleets, and municipal operations creates a unique density of fuel-dependent infrastructure where equipment failure carries serious consequences. Fleet Core’s diesel fuel testing in Lakewood CO serves the facility managers who need backup generators ready for emergencies, the fleet directors managing dozens of vehicles through mountain passes, and the operations managers responsible for public services that communities depend on daily.

Fleet Management
Learn more →

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
Learn more →

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
Learn more →

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.
Testing Turns Guesswork Into Informed Decisions
You know your equipment matters. What you might not know is whether that fuel you’ve been storing for the past eighteen months is still protecting expensive injection systems or quietly becoming corrosive enough to cause failures. Testing eliminates the uncertainty that leads to either premature maintenance spending or unexpected breakdowns. You’re making decisions based on what’s actually happening in your fuel, not assumptions about what should be happening.
The peace of mind that comes with confirmed fuel quality isn’t just emotional comfort. It’s operational confidence that lets you focus on running your business instead of worrying about fuel-related failures. When winter storms hit and your facility’s generators need to carry full building loads, you’re not crossing your fingers and hoping. You know the fuel will perform because testing proved it weeks before the emergency arrived.

Lubrication
Learn more →

Lubrication
- Lubricate engine components
- Minimize friction
- Prevent damage from metal-on-metal contact

Cooling
Learn more →

Cooling
- Cool engines
- Absorb heat
- Prevent breakdown and failure

Washer Fluid
Learn more →

Washer Fluid
- Crystal clear operator vision
- Vehicle safety
- Winter operations protection

Emissions Compliance & Performance
Learn more →

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.”