Fleet Core Inc

Fluids for your Fleet
Fleet Core Inc. is your one-stop for all your fuel-related needs. With 24/7 Mobile Onsite fueling, Fuel Polishing, Tank Cleaning, Tank Leasing, and much more, we have you covered when you need your equipment to perform. Looking for a company that will support your fueling needs with timely deliveries, superior products, excellent customer service, and prompt billing? Just talk with our customers and let them tell you why they use Fleet Core Inc. Let us show you the difference! 
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On-Site Fuel Delivery

Get Fuel Delivered Right to Your Site with Our Reliable On-Site Fuel Delivery Services. Prompt and Efficient service for Your Vehicle Fleet, Equipment, or Generators.

Bulk Oil Delivery

Get Your Engines Running Smoothly with Our Bulk Engine Oil Delivery Services – No More Downtime, Maximum Efficiency Guaranteed!


Core Power Premium

Contact Fleet Core Inc. to ask about Core Power Premium highest quality fuel, oil, and additives to improve your equipment’s functioning and performance.


Fuel Polishing

Maximize engine performance with our professional fuel polishing services. Clean fuel, clean engine, smooth ride!

Fuel Tank Lease

To help our customers upgrade their bulk fuel facilities for a period of ten years after which time you will own the tank.


DEF Delivery

We specialize in supplying 330-gallon totes of high-quality DEF to businesses throughout the Denver area.

Send a message

For more information or quotes on our line of products, please fill out the form below and a Fleet Core Representative will be in contact with you within 24 hours of submission.

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What is Fuel Polishing and why is it important?

What is Fuel Polishing and why is it important?

Maintaining high-quality fuel is crucial for businesses that rely on stored fuel to power their operations. Contaminated fuel can lead to engine damage, reduced efficiency, and increased maintenance costs. To combat these issues, fuel polishing has emerged as a...

The Benefits of On-Site Diesel Fuel Delivery for Denver Businesses

The Benefits of On-Site Diesel Fuel Delivery for Denver Businesses

On-site diesel fuel delivery is a service that provides businesses with a convenient, efficient, and cost-effective solution for managing their fuel needs. As the demands of modern business operations continue to evolve, it's crucial for companies in Denver, Colorado...