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For Consumers

Whether you drive a diesel car or operate a big rig, you can rely on the diesel additives from Power Service for year-round engine performance improvement, trouble-free winter operation and proper fuel tank hygiene. We are the diesel experts and any size diesel engine will run better with Power Service.

All Consumers

For Industries

From some of the largest fleets in North America to large construction and mining operations, commercial industries rely on Power Service diesel additives to provide year-round diesel engine performance improvement, trouble-free winter operability and proper fuel tank hygiene.

For Industries

Learning Center

Find articles, videos, and helpful tips for maintaining your diesel engine. You'll also find product information, useful resources, and advice from our expert team.

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About Us
Meet our team

Ed Kramer

Owner & President

Power Service Products President and Owner Ed Kramer is a lifelong community supporter of Weatherford and Parker County. When Ed took over management of Power Service from his father in 1971, he had only one product to sell. Within five years, Ed established a national distributor network, so that by 1976 Power Service Diesel Fuel Supplement was available coast-to-coast and by 1981 was the nation’s best seller — a title the company still holds.

Today, Power Service Products, a third-generation family business, offers a complete line of diesel fuel additives. What started over 50 years ago in a small, one-car garage has grown into one of the industry’s biggest and most endearing success stories.

Ed’s commitment to excellence extends far beyond his company’s walls. He believes in giving back to the community and has provided his expertise and financial support to local organizations. Currently, Ed serves on the board of directors for the Weatherford College Foundation and as board president of Project Opportunity. He previously served as a board director for First National Bank and as a trustee for the Weatherford Independent School District. Additionally, Ed is proud to have contributed financial support to the Doss-Heritage Culture Center, Weatherford Little League, Friends of Weatherford Library, Weatherford Education Foundation, and the Weatherford College Foundation. A member of Grace Presbyterian, he holds current and past committee roles within the church.

Community Support and Involvement:

  • Past Director – First National Bank
  • Past Trustee – Weatherford Independent School District
  • Past and current committee member – Grace Presbyterian Church
  • Board member – Weatherford College Foundation Board
  • President of Project Opportunity
  • Supporter of Doss-Heritage Culture Center
  • Supporter of Weatherford Little League
  • Supporter of Friends of Weatherford Library
  • Supporter of Weatherford Education Foundation
  • Supporter of Weatherford College Foundation


Ruth Swain

Chief Operations Officer

Ruth Swain began her career with Power Service in 1977, which has enabled her to experience all facets of the company and to grow professionally as the company has grown. Ruth started as a receptionist and was later promoted to Office Manager, then Operations Manager. In 1990, she was promoted to Vice President of Operations and was elected to the Power Service Board of Directors in 1994. In 2004, Ruth was named Chief Operations Officer, where she manages day-to-day business operations including management of administrative employees, coordinating production requirements with warehouse manager and bulk chemical plant manager, and procurement of raw materials. Ruth also manages the company’s financial requirements, property and casualty insurance requirements, and serves as trustee of the company’s 401k plan.

After 37 years with Power Service, Ruth strives to set high standards and do the best work possible. She loves the challenge of utilizing the strengths of Power Service’s employees and technology to advance the company in the diesel additive industry. Over the last four years Ruth has also served on the Kramer Family Foundation Board of Directors.


Bob Sellers

Senior Vice President of Sales

With more than 30 years of experience at Power Service Products, Bob Sellers, Senior Vice President of Sales, is responsible for developing and executing Power Service’s national sales plan. Working with the company’s national sales force and distribution network, Bob promotes the company’s core values and facilitates teamwork at all levels. In addition, Bob is actively engaged with Power Service’s strategic planning team to formulate sales plans, marketing strategies, and operational efficiencies that promote company growth.

Bob is a member of SIGMA, NPTC, the U.S. Department of Energy Clean Cities program, the Ohio Trucking Association, the Tennessee Trucking Association, and the Granite State (New Hampshire) Maintenance Council. Bob is also a volunteer with the Weatherford Independent School District Education Foundation.


Ken Stratton

Senior Vice President of Retail Sales

As Senior VP of Retail Sales, Ken Stratton is responsible for management of sales to national automotive retailers, OEM dealers, truck stops, and export customers. Ken began working at Power Service in 1998 with 13 years of sales experience in the automotive retail arena and has developed a comprehensive view of the retail community as it relates to sales of automotive performance chemicals. A self-described “people” person, Ken enjoys the challenge of finding the win/win scenario for Power Service and retail customers.

Ken’s hobbies include backpacking, camping, and climbing Colorado’s 14,000-foot peaks.


Jeff Kramer

Vice President of Sales Western U.S.

Jeff Kramer manages Power Service Product’s business development, sales, and sales team west of the Mississippi. Jeff loves playing a strategic role in the success of the business and individuals he works with on a daily basis. Since beginning his career at Power Service in 1999, Jeff has had the opportunity to learn the entire business – from supply chain and procurement, to sales and financial management. His holistic experience at Power Service helps him better understand the issues the company’s customers face and develop strong working relationships.

Jeff holds an MBA from Texas Christian University’s Neeley School of Business and is a member of SIGMA, WPMA, DIFFA, The First Tee of Fort Worth youth development program, and the Weatherford Economic Development Advisory Board. In his free time Jeff enjoys hunting, fishing, and golf.


Mandy Kramer Storm

Vice President

As Vice President of Power Service Products, Mandy Kramer leads the company’s advertising and marketing efforts, including the website, media, literature, labels, and packaging. Mandy went to work with her dad at Power Service after graduating from Baylor University in 1996. Mandy’s natural tenacity, creativity, and love of reading have been invaluable in her career. She has also found personal fulfillment and excitement as a woman in a traditionally male-dominated industry.

Mandy is a member of the Weatherford Independent School District Education Foundation Grant Review Committee, Weatherford Project Opportunity Foundation and the Kramer Family Foundation. She also volunteers weekly at the Tarrant County Presbyterian Night Shelter and is a member of its Board of Directors. In her free time Mandy enjoys reading and traveling to exotic locales with her husband and son.


Robert Araiza

Warehouse Manager

Robert began working in the warehouse at Power Service as a young man in 1982. His leadership ability and mechanical skills propelled Robert to take over as Warehouse Manager in 1995. Robert’s passion and commitment to Power Service and the employees that he manages are unmatched. The saying about not asking others to do something that you wouldn’t do yourself is an apt description for Robert. He can, and does, perform any job in the warehouse. Robert has been with Power Service through years of unprecedented growth and ensures our warehouse operates with the highest level of safety, excellence and efficiency.


Brian Fleming

Tank Farm Manager

Brian began his career at Power Service in 1984. The tank farm and its capacity have gone through multiple periods of expansion as sales of Power Service have grown and Brian has provided seamless management through this growth. Brian has distinguished himself as a manager capable of multi-tasking and going the extra mile to ensure Power Service customers receive the highest quality products. His commitment to Power Service and the excellence of his job performance make Brian a most valued manager.


Lonnie Stefekos

Regional Manager of the Northeast

Prior to joining Power Service in 1990, Lonnie Stefekos had more than 25 years of experience working in the heavy-duty equipment industry as an automotive jobber in Northern New Hampshire and also as a district sales manager for an industrial lighting company in Syracuse, NY. Today, Lonnie provides sales, distributor development, technical support, and leads Power Service’s brand expansion for the Northeast Region, including New York, New Jersey, Eastern Pennsylvania and all six New England states along with the eastern Canadian provinces.

Lonnie is a longtime member of the New Hampshire Good Roads Association, the New England Convenience Store Association, and SIGMA.


Gavin D. Bowers

Regional Manager of the Mid-Atlantic States

Gavin Bowers joined Power Service in 2005 and serves as the Regional Manager for the Mid-Atlantic States. In this role Gavin is responsible for sales generation, brand expansion, customer procurement, and provides customer support for fuel jobbers, warehouse distributors, and other customers in the field. Gavin appreciates the strong bond he has built with customers over the years and he derives satisfaction from motivating his sales team and inspiring those around him to succeed.

In his personal time, Gavin enjoys outdoor activities, traveling, and spending time with family and friends.


Chris Brian

Regional Manager of the Southeastern U.S.

Chris Brian began working at Power Service in 2010 and moved into the role of Regional Manager of the Southeastern U.S. in 2013. There he maintains and grows Power Service’s relationships with fuel marketers, warehouse distributors, regional retailer accounts, and end users. Chris’s inquisitive nature has always left him tearing things apart to find out how and why they work. This understanding of how to technically address the “how and why” gives Chris the skills needed to bring products to market. In addition, his experiences at the corporate office and manufacturing facility have given Chris the direct background and knowledge to accurately communicate the benefits of the company’s products to customers in the field.

Outside of work, Chris enjoys spending time with friends and family, fly-fishing, golf, cycling, and photography.


Larry Remensnyder

Regional Manager of the Great Lakes

Larry Remensnyder has 34 years of experience in both sales and product development within the petroleum industry. In June 1999, Larry joined Power Service as the Great Lakes Regional Manager responsible for calling and servicing refiners, terminals, pipelines, fuel jobbers, fleets, and retail chains in Illinois, Indiana, Wisconsin, and Michigan. Over the past 15 years this territory has grown considerably and today is one of the largest in the company. Larry enjoys developing partnerships with his customers and sharing his expertise. Larry also enjoys mentoring for his fellow Regional Managers and serves as a technical resource for company management.

In his free time, Larry is an avid fisherman and teaches his granddaughters to play baseball and tennis.


Matt Mullins

Regional Manager of the Mid-Southern States

As Regional Sales Manager, Matt Mullins educates warehouse distributors and customers and provides great service that grows the distribution network within the eight states of his region. Matt joined Power Service in 2003 and has been the recipient of the company’s prestigious Presidents Circle Award for year-round growth of non-winter product sales. Matt brings his extensive knowledge of the latest diesel fuel additive technology to his customers. Though on the road extensively, in his rare free time, Matt coaches soccer and loves being a father to his son and daughter.

Matt is a member of SIGMA, TCPA and TAPT.


Garth Redifer

Regional Manager of the Pacific Northwest

Garth Redifer was raised in a logging family around all types of diesel logging equipment, giving him comprehensive knowledge of how diesel engines work and operate. Today, Garth retains a strong passion and interest in all things mechanical and brings this passion to his work with Power Service customers and distributors in the Pacific Northwest. As Regional Manager, Garth leads the sales process from trade show coverage and lead generation, to product positioning, sales opportunity evaluation, customer procurement, and post-sales customer support. Garth responds promptly to customer needs and updates management on customer service issues to improve service.

Garth serves as a Boy Scout Cub Master and Den Leader and enjoys building and restoring hot rods, boating in Puget Sound, fishing in Alaska, and skiing in Washington and Montana.


Don Martin, Jr.

Regional Manager of the Midwest States

Don Martin began working part-time for Power Service in the late ‘90s while in college and then full-time in 2001. As Regional Manager of the Midwest States, Don’s role is about listening to the needs of drivers and farmers and demonstrating how Power Service protects their equipment and saves them money. Don believes providing ongoing education through fuel seminars and sales meetings with regional distributors, fleets, and national retailers is imperative in today’s ever-changing fuel market. He also offers technical assistance when fuel issues occur and communicates the challenges or successes from the field to Power Service management and distributors, which enables Power Service to develop the best technologies in the marketplace.

In his free time Don enjoys fishing and hunting in the Western U.S.


Jim Vanderhill

Regional Manager of the Southwestern States

Jim has nearly 25 years of experience in the petroleum industry. Since joining Power Service in 1996, Jim has appreciated the company’s strong camaraderie and family-oriented values. Over the last 18 years, Jim’s exemplary organizational skills have allowed him to exponentially grow two sales regions. He has a strong passion for seeking out new distribution opportunities and cultivating both new and existing customers with extensive training and fieldwork.

When not working, Jim is busy raising three teenage daughters and serves as the Colorado liaison for the Vasculitis Foundation in an effort to help his oldest daughter battle this rare disease. Jim’s hobbies include golfing, fly fishing, and skiing in Colorado’s Rocky Mountains.

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