Need DEF?

We've Got You Covered!

Diesel Exhaust Fluid (DEF) is an essential part of modern diesel engines, offering both environmental benefits and compliance with emission regulations. Our range of DEF products provides solutions for various applications, ensuring that you meet both regulatory and performance needs. For more details choose a size option below.

Our Service Area

Hirschman Oil Supply Service Area Map



Hirschman Oil Supply
2727 W. Vassar Rd (M-15)
Reese, Michigan 48757

11 Complete Counties: Gladwin, Midland, Bay, Saginaw, Gratiot, Shiawassee, Genesee, Lapeer, Tuscola, Sanilac, and Huron.

If you are outside our main service area, please feel free to contact us to discuss your needs!

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