Harper Oil Products, Inc. & Harper Properties, Inc.

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Harper Oil Products

PO Box 6325

Florence, KY


Office: 859-283-1001

Email: info@harperoil.com

World Class Products & Services

Since 1955

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Harper Oil offers a wide variety of fuel additives to fit your needs. We offer ValvTect brand additives:

Diesel Guard Supreme Premium Diesel Additive


Bioguard Plus 6 Multi-functional Micro-Biocide

Thermoguard Premium Heating Oil Additive

ValvTect Ethanol Gasoline Treatment

ValvTect Octane Boost

Call us at 800-433-0675 to discuss your needs with one of our representatives or send an e-mail to sales@harperoil.com