Conveniently located right off SD Highway 12 in Milbank, SD, UPI Petroleum is a locally owned full service bulk fuel and propane provider. UPI has been serving northeastern South Dakota for over 30 years. With a full convenience store and bait shop, we pride ourselves on keeping prices low and having great customer service.
Bulk Fuel: UPI is proud to provide northeastern South Dakota with bulk fuel and bulk propane for over thirty years. UPI also offers bulk oil, hydraulic fluid, DEF fuel, and fuel and propane tank rentals. Whether you are filling a propane tank for your home grills or depending on it to heat your home, UPI is here to take care of you.
Convenience Store: With our wide selection of snacks and beverages, you will have everything you need for your next road trip! We also have firewood, ice, propane exchanges, South Dakota Lottery, and more!
Fishing Bait & Tackle: We have what you need for your next fishing trip! We offer a wide selection of live bait, fishing line, hooks, lures, jigs, spinners, and more! We can also take care of your hunting and fishing licenses. We are the one stop shop to get you out on the water as soon as possible!
Tire Services: Twin Valley Tire