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Petroleum Wholesale

We offer the supply and distribution of petroleum products across seven states throughout the Midwest including Iowa, Minnesota, Montana, Nebraska, North Dakota, South Dakota, and Wyoming. As a company built from the ground up in the Midwest, we understand what it takes to be a preferred petroleum supplier in our region.

A Focus on People

Our team is made up of quality employees who are devoted to providing a superior level of customer service. We’ve built a team of seasoned professionals who understand the markets we serve and can help create an effective buying strategy that fits your needs. Our professional drivers are courteous and focus on safety.

Superior Supply

For more than 35 years Harms Oil Company has built relationships with petroleum refiners. Our relationships have allowed us to supply our customers during times of fuel shortage.

The Brands You Need

We are an authorized distributor for a number of trusted brands and the benefit of our buying power is passed on to you. We have the brand you need when you need it.

Top-of-the-Line Equipment

Safe and reliable equipment is important to our customers and our employees. Our fleet of late model trucks regularly undergo preventative maintenance checks to ensure product quality is never compromised and is delivered when you need it.

If you’re a convenience store owner or an end user looking for a new petroleum supplier, we’d love to hear from you. Contact us today.

Our Service Area

Service Area Map

Get in Touch

Mark Sweetman

Sales Manager

(605) 696-5003 (office)
(605) 690-9055 (cell)

Mike Burgers

Marketing Manager

(605) 696-5005 (office)
(605) 690-5408 (cell)


My fuel purchasing decision is strictly price driven. I used to call around searching for that low price. I’ve found that Harms Oil consistently offers competitive pricing and their customer service is top-notch. Anymore, it’s just one phone call and I know I will receive a great price and great service."

- Harms Oil Customer

Harms Oil understands the business.Fuel costs are a big line item for my trucking company. When markets are moving up they make sure my tank is full. When markets are down they allow me to take advantage of the lower prices. Other companies say they watch markets. I’ve found that Harms Oil truly does."

- Harms Oil Customer

As a farmer, fuel is important to me twice a year. Just because I’m a seasonal buyer doesn’t mean fair pricing and great service are any less important to me and Harms Oil understands that.Whether I’m pricing contracts in the off season, or busy in the field, I know I can count on Harms Oil Company."

- Harms Oil Customer

I thought all fuel companies were the same until I started doing business with Harms Oil. When I needed fuel sooner than expected, they re-routed a truck to make sure I didn’t end up with hours of down time. I have a smaller operation but that doesn't matter to Harms, they treat me like I'm a big account."

- Harms Oil Customer

bp Phillips 66 Conoco Clark Sinclair Shell Cenex