About Us

Diesel Fuel Injection Service, Inc. was founded in June 1946 by L.M. “Red” Ottenad. It has grown from a 90 square foot shop to a modern 10,000 square foot service facility. The company has been headquartered at our current address in St. Louis, Missouri for over 70 years.

As the business has grown and our industry has changed, our philosophy of customer service has remained the same. Quality, in the highest sense of the word, is the guiding force in our daily work. To that end, we are proud to say we are an authorized service center for the major fuel injection equipment manufacturers in the world. Our services are in use across the globe as we have serviced equipment operating in South Africa, South America, Puerto Rico, Canada, United Kingdom and Australia.

We invite you to discover why our service is known worldwide and see that we are able to serve your needs with accredited, dependable service. You will then understand why our service is your solution.

We currently service the area around St. Louis – both in Illinois and Missouri. We have the latest technology and equipment to meet all your service requirements for diesel fuel injection systems. We are an Authorized Dealer for Bosch, Stanadyne, Zexel, Denso, and Ambac (American Bosch) engine systems. We also service Delphi/CAV-Lucas, Caterpillar, and Cummins fuel systems. We have parts and service for your Navistar, John Deere, Ford, General Motors, Cummins, Volvo, and Caterpillar diesel engines to name a few. We are Missouri and Illinois’ industry leader in diesel fuel injection sales and service for transportation, marine, industrial, construction, agriculture and more!