ABOUT US   applogo48

“This company shall continue forever.”
– Roger McDaniel, CEO

Duncan Oil Company is a family owned and operated company providing quality petroleum products to customers for over 60 years. In that time Duncan has grown from a small company in Beavercreek, Ohio to a major fuel supplier with customers spanning across thirteen states.

Who we are

We specialize in supplying independent supermarket fuel centers, as well as assisting in the forecasting, designing, building, managing, and supporting of the fueling center. We are also a proud distributor for the Valero, Marathon, Clark, and VP Brand. As well, we also service and supply product for numerous unbranded customers.

We also operate a separate transport company, DOTS, as well as a construction and maintenance company, complete with environmental consultation, All In One. This enables us to be a complete “one-stop shop” for all of our customers’ petroleum needs.

Our vision

As a privately-owned energy provider, we will always strive to be the very best, and to be the leader amongst our peers.

Our values

Teamwork: Together everyone accomplishes more.
Integrity: Do the right thing, all the time.
Improve: Get better at what we do – always!
Growth: We grow, or we go – away.
Profit: Fuels growth and creates opportunity for all.

Our experience

60 Years in the Petroleum Industry
40 Years of Fuel Center Maintenance Experience
30 Years of Branding Experience
25 Years of Transportation Experience
20 Years of Propane Knowledge
Satisfied customers
Years of experience
Distributed brands
States serviced

applogo48  OUR SERVICES

Because of our wide diversity in the fuel industry, we have a huge variety of services available to our customers. Whether it’s getting a timely fuel delivery to your home or gas station, repair to your fuel dispensers, or even environmental compliance with your on site fuel storage, Duncan Oil Company can assist you with virtually any asset you have when it comes to maintaining and running your fuel operations.


Since 1960 Duncan Oil has been the trusted choice for heating oil in Dayton and the surrounding areas. Proudly offering clean-burning propane and safe, economical heating oil, Duncan Oil will keep you and your family warm.

24/7 Customer Support

We offer emergency service for all of our customers. For residential, please call our tank wagon division at 937.608.0024. If you’re a retail location, please contact our DOTS Dispatch department at 937.708.9339.


We offer a complete, worry-free solution to all of your retail fueling needs with our industry-leading programs. To ensure your success, our marketers will perform a thorough evaluation of your site, including market research, on-site inspection, as well as analysis of competitive and economic conditions. We also offer pre-engineered layouts for C-stores, with fully customizable options to meet your specific needs.


Staffed by industry veterans, All In One Maintenance is Duncan Oil’s own petroleum maintenance division that has been in operation for over twenty years. As the petroleum industry continues to grow with technological advancements, so does All In One’s repertoire. All In One serves the greater Ohio, Kentucky, and Indiana areas, covering every type of maintenance and environmental solution that your retail location could possibly need.


We offer wholesale fueling options for our customers who demand high volume fuel on tight deadlines. We will save you time and money by bringing your fuel to your location. Our wholesale tank wagon division can fill up to 5,000 gallons in a single load. We will even fill directly into your equipment to save you the hassle and time.

Performance Fuels

We at Duncan Oil are proud to offer our very own division specializing in fuels for racing applications, as well as performance enthusiasts. From the dirt track to the drag strip, and every Sunday cruise in between, Duncan Oil Performance Fuels has the right fuel for you and your vehicle.


  • Great, friendly service from a trustworthy local company. We would highly recommend Duncan Oil for your heating oil needs.

    Shaana & Larry Daumann
    Beavercreek Ohio Residents
  • Duncan Oil has give us here at A&A Truck Plaza great service and support when needed. Keep up the good work. Thanks!

    Sally Case
    A&A Truck Plaza, Jackson, Ohio
  • Great selection and knowledge, both technical and on the track, of various brands of fuel. I couldn’t be happier with Duncan Oil Performance Fuels.

    Ron Leach
    Owner: Ron's Custom Paint - Cincinnati, Ohio
  • I recently switched propane suppliers and have been thrilled with the friendly, knowledgeable staff and excellent customer service provided by Duncan Oil.

    Mike Hannah
    Jamestown, Ohio Resident
  • I couldn’t ask for better support in a supplier. Duncan’s quick, responsive team goes above and beyond to help with my every need.

    Lloyd Goff
    Owner: All in One Marathon, Dayton Ohio
  • I have been doing business with Duncan Oil for nearly 20 years, and in that time I feel that we have developed a strong, mutual relationship based upon loyalty and integrity.

    Keith Huelskamp
    Owner: Dixie Drive-Thru, Englewood Drive-Thru, Interstate Drive-Thru, and Kettering Cruise-Thru
  • Duncan has always provided on-time delivery and friendly service. I know I can count on Duncan Oil.

    Justin Adams
    Beavercreek Ohio Resident
  • We have been doing business with Duncan 3 years and their customer service has always provide a prompt response, and that is appreciated.

    Jimmy Wade
    McCleary Oil Co., Chambersburg, PA
  • Duncan Oil has been a very loyal and responsible community oriented business.

    Gary Wise
    Wrestling Coach: Beavercreek High School, Beavercreek Ohio
  • I trust and recommend Duncan Oil Performance Fuels in every high-performance engine I build. From street to strip, Duncan has the right fuel for your needs.

    Dave Middleton
    Owner: Performance Clinic Custom Engines - Dayton, Ohio
  • We switched to Duncan Oil five years ago. They are reliable and on time. Duncan understands the importance of being here to keep my fleet on the road.

    Bob Kennedy
    Owner: Aqua Falls Water Co.