Serving Our Customers

Knapp Oil Co., Inc. and Citgo offers top notch products & lubricants to our valued customers.

After being in this industry for over 75 years, at Knapp Oil we understand that each customer is unique. That is why we create customized solutions for all of our customers that fits their situation and assists them in increasing their success. If you have any questions about the services we provide, please feel free to contact us by:

Phone: (618) 678-2211 or Submit a Contact Us form.



After working with customers in the agricultural business for years, we understand that time is a valuable asset. That is why we, here at Knapp Oil, will make sure that you receive quality service and quality products in a timely manner. Whether reordering products before it is too late or having our service truck meet you at the field to repair a tire, we are dedicated to your success.


Because we operate our convenience stores, we recognize the challenges that dealers face.
We offer the following: Keep fuel prices down with competitive pricing and market monitoring, Help develop ideal fuel product offerings, Have available expert technicians, Help solve maintenance issues quickly, Even assist with selection of other suppliers.


Because we are truckers ourselves, we understand your needs. Truckers need competitively priced fuel, quality bio-diesel, quality lubricants, and all the miscellaneous products like DEF, anti-freeze, etc.

We are your fuel service supplier.

Coal Mining

Mines need a wide range of lubricants to support their operation. We have both major and private brand lubes to meet all of your needs. We can also provide the necessary tanks and pumps to handle the inventory as well as the expertise to put the whole package together.

When it comes to fuel, we can provide both straight diesel and bio-diesel at competitive prices as well as the ability to beat the market. We work hard for you.