40+ Years In Business
Joseph Wannemuehler Sr began working for Standard Oil of Indiana and then Amoco Oil company was joined by his son Joseph Jr in the industry. After Joseph Sr passed, Joseph Jr continued the tradition until 1977 when he was able to become an independent company founding Wannemuehler Oil Company in 1977.
The Wannemuehler family continued servicing petroleum customers through the decades with the addition of Joe’s son’s Gene, John, David, and Tommy.

In 1999, Gene, David, and John created WOC Maintenance Company by adding James Butch Head (Butch) as the first employee. The maintenance company became a direct service provider for what was then Wannemuehler Oil and others. WOC Maintenance strived to provide a long range of services, patrons have benefitted from their lifelong knowledge of equipment solutions.
WOC’s commitment to quality, fair prices, integrity, and customer service are still the principles that guide us today.
In 2001, WOC became a Rotary Lift distributor allowing us to sell, service, install automotive lifts. Our first inspector joined the team in 2016; today we have two Automotive Lift Institute (ALI) certified lift inspectors.
John and the team have grown WOC into 25 employees who travel across the country specializing in the design of fuel and lubricant aboveground storage tank (AST) customized solutions to meet our customers’ needs. We provide tank cleaning, fuel filtering, fuel and lubricant equipment sales.
In 2023, WOC has introduced a Truck Fabrication Division, adding the ability to build or refurbish delivery equipment and vehicles.
Mission Statement
Establish professional, long term relationships through partnering with our customers to provide them with best in class petroleum and automotive equipment, products and services.
Values
- Commit to honesty, fairness, integrity, and ethics in all aspects of our business.
- Treat customers and employees the way you want to be treated.
- Commit to an environment that promotes respect and concern for the safety and health of all people.
- Commit to teamwork.
- Make work enjoyable and rewarding.
- Be accountable for our performance.
Vision
- Continually enhancing our technicians’ skillsets to best service our customers.
- Expand our products and services across the United States.
- All employees work together practicing our values to consistently achieve our goals, making WOC an enjoyable place to work.
Ultimately
- We believe that all we have, whether great or small, is a gift from God and we must daily give our maker thanks by submitting to His will and being ever mindful of the greatest gift, His Son Jesus Christ.








