Fueling Colorado's Innovation and Progress Since 1976

Our product line includes diesel, gasoline, kerosene, and fuel additives—all formulated to enhance performance, maximize efficiency, and reduce costs.

• Bulk Fuel Delivery Service: We have one of the biggest fleets in the Rocky Mountain area and supply major businesses across Colorado with diesel and gasoline. Our product lineup includes everything from Gasoline, Renewable Diesel, On-Road & Off-Road Diesel, K-1 Kerosene, Unleaded 87E-10 Gasoline, Unleaded 89E-10 Gasoline, Unleaded REC-90 Gasoline, Racing Gasoline, Aviation Fuels, Jet-A, Methanol, Winterized Fuels, VP Racing Fuels and more.  You get to enjoy flexible delivery capabilities, with transport trucks for high-volume deliveries and tankwagons for smaller or hard-to-reach locations, ensuring seamless, reliable fuel service throughout the state.

• • Wholesale Bulk Fuel Delivery: From small farms to major enterprises, we deliver customized fuel solutions for every need. Serving a wide range of industries, including Agriculture, Aviation, Construction, Industrial Generators, Locomotive, On-Highway Fleets, Mining, Municipalities, and Racing.
  • Retail Bulk Fuel Delivery (C-Store): Dependable fuel delivery for convenience stores throughout Colorado.

• National Fuel Network: Fuel up anywhere, anytime with our extensive fuel card program, providing nationwide access to fuel and DEF for seamless, on-the-go convenience across the country. Learn more about National Fuel Network.
• Job Site Fueling: On-site truck-to-truck fueling eliminates storage hassles, providing you with safe, direct access to fuel when you need it.
• Fuel Additives: We have a comprehensive range of premium fuel additives designed to enhance engine performance, improve fuel efficiency, and ensure optimal operation across various industries. Our product lineup includes: Diesel Fuel Additives (Winter and Summer Diesel), Diesel Fuel Treatments, Gasoline Additives, Gasoline Treatments, Stabilizers, Fuel Injector Cleaners, Octane Boosters, Tank Maintenance Additives for storage and water removal, and fuel testing services to monitor and maintain fuel integrity.

Protect your equipment and boost performance with Rhinehart Oil’s top-tier lubricants for automotive, commercial (on and off highway), and industrial use.

• Mobil™: We’re proud authorized distributors of Mobil™ for over 40 years, offering products known for their efficiency and protection across various sectors.
• Ridgeline™: Experience innovation and performance with Parkland’s proprietary lubricants, DEF, and specialty products.

Our products range from Mobil Lubricants, Ridgeline Lubricants, Motor Oil–Passenger Car Motor Oil | Heavy Duty Motor Oil, Automatic Transmission Fluid, Hydraulic Oils, Natural Gas Engine Oils, and more.

Sourced from top brands like Mobil and Ridgeline, our synthetic lubricants are engineered for extreme conditions, delivering unmatched durability and protection. Designed to reduce wear, improve efficiency, and extend maintenance intervals, they keep your equipment performing smoothly and reliably in the toughest environments.

We provide API-certified DEF, including Ridgeline DEF, across our network to help lower NOx emissions and support diesel SCR technology. Our DEF is available in multiple sizes, from 2.5-gallon boxes and 55-gallon drums to 275- and 325-gallon totes and bulk transport, ensuring a solution for every scale of operation. Reach out to any of our branch locations for quick and convenient ordering.

Keep your equipment from freezing and corrosion with high-quality antifreeze solutions, including Ridgeline, Mobil, Fleet Charge, PEAK–Advance, Global ELC, Final Charge ELC, RV, and Marine. We proudly distribute antifreeze across the Rockies, Pacific Northwest, and Northern ROCs, ensuring reliable protection wherever you operate.

Rhinehart Oil offers comprehensive fleet fueling services tailored to streamline fuel management, increase control, and keep operations running efficiently. From convenient on-site fueling—including filling bulk tanks—to cardlock access at our company-owned sites (with competitive pricing that helps you avoid unnecessary convenience store expenses), our solutions offer flexibility, accountability, and cost savings. Our NFN Fleet Card program provides access to a national network of fueling sites with OTR discounts, allowing you to manage fuel consumption and control expenses effectively.

We offer rental and purchase options for equipment needed to manage your bulk fuel and lubricants, ensuring seamless operations without heavy upfront investment.

Our 24/7 digital tank monitoring system, Otodata, gives you full visibility into your fuel levels, with round-the-clock support to keep your business running smoothly.

Avoid costly breakdowns that can result in downtime with our custom fluids analysis programs. We offer tailored testing services to keep your machinery in peak condition.

From washer fluid and propane to winterized fuel and white oil, Rhinehart carries a wide range of specialty products to keep your business running efficiently.

Keep your vehicles and equipment in top shape with our premium TEG and EGs chemicals.

We supply everything your industrial operation needs to stay efficient and productive. From Glycols (propylene, ethylene) and Methanol to RIDGELINE™ Washer Fluids, Drip Oil, Aircraft De-Icer, Antifreeze, DEF, Kerosene, Solvents, TEG, Racing Fuel, and more, we’ve got you covered with top-quality industrial specialty products. For a full list of products, give us a call, and if we don’t have exactly what you’re looking for, we’ll work to source it for you.

Get a full range of industrial lubricants, including fire-resistant fluids (FRH), that deliver reliable protection for your high-risk equipment. Our Mobil industrial lubricants are developed in collaboration with leading equipment manufacturers and are specially formulated to extend lubrication intervals, safeguard equipment, and ensure problem-free operation across various environments. Whether you need mineral or synthetic-based oil, we have the right product to keep your equipment running smoothly.