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Welcome to Rainbo Oil Company!

Since 1923, Rainbo has been passionate about convenience and delivering the best service to our customers possible. Headquartered in Dubuque, Iowa - Rainbo is multi-line lubricants distributor serving Iowa, Illinois, Minnesota, Wisconsin, Michigan, South Dakota, Nebraska, and Missouri. Our services include: oil analysis, lubricants (storage, handling, and dispensing), inventory monitoring and management, metalworking fluids control. 

We are excited to be celebrating 100 years of excellent customer service and superior products. Please contact us for pricing, product information, or to inquire how we may provide you with any of our services!

Corporate Office Hours:

7:30 AM - 5:00 PM


7:30 AM - 3:00 PM


2255 Kerper Blvd

Dubuque, IA 52001

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