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Toll Free: (800) 296-1203
Phone: (410) 342-1200

Our History

Original Duralene Driver Standing by His Truck
Duralene Motor Oil Sales Stand

Customers of The United Oil Company have benefitted from superior quality Duralene® Heavy Duty Lubricants since 1920. As the Baltimore, Maryland region's only independent heavy duty lubricant manufacturer, as well as one of the oldest in the United States, our founding principles guide our every move. Stability and consistency, coupled with word-of-mouth, fuel our continued growth.

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Biodegradable / Environmental

Formulated to be sustainable and environmentally-friendly

Bulk Fluid Installations

Fully staffed and stocked inhouse equipment department

Food Grade

A full inventory of Bel-Ray Total Performance Lubricants

Private Labeling

Engine oils, hydraulic and transmission fluids, and more

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