Automotive Fleet
MenuMENU
SearchSEARCH

How Two Fleets Save Time & Money With Centralization and ‘Firm Pricing’

Electric and natural gas company Ameren fuels its fleet vehicles at 16 onsite facilities, while electric utility Southern Company utilizes ‘firm pricing’ to level fuel costs.

by Cheryl Knight
March 1, 2007
How Two Fleets Save Time & Money With Centralization and ‘Firm Pricing’

 

5 min to read


As fuel prices continue to fluctuate, some fleet managers struggle to implement a cost-efficient plan for the future. Many managers look to fuel card programs for help, while others manage onsite programs and utilize ‘firm pricing’ strategies. Each alternative represents a viable fuel management solution, depending on a fleet’s specific needs.

Ameren Corporation has combined onsite fueling and retail fuel card use into one fuel management program, resulting in effective, risk-reducing cost management. With headquarters in St. Louis, Ameren’s four operating companies provide service to approximately 2.4 million electric and nearly 1 million gas customers in Missouri and Illinois. Its fleet includes 4,100 powered vehicles. Cal Kretsinger, Ameren’s fleet administrator, offers three fueling models to fleet drivers.

Ad Loading...

The models include purchase at a retail pump if access to an onsite pump is not available; wet-hose fueling in the Eastern Missouri area; and onsite fueling in Illinois, where there are currently 16 fueling sites.

“We tie all three of our fueling models to the Voyager fuel card,” Kretsinger said. “Our models give us a snapshot of our entire vehicle fueling experience.”

Onsite Fuel Card Program Offers Convenience & Efficiency

Tying the Voyager fuel card to Ameren’s onsite fueling provides convenience and efficiency, while minimizing lost crew time, according to Kretsinger.

He explains that local managers in the St. Louis metropolitan area (AmerenUE) prefer to use a tanker-to-truck (wet-hose) solution to take advantage of the centralized fleet there. Wet-hose supplier Sieveking, Inc. provides the convenience of onsite fueling after hours and invoices Ameren electronically through Voyager using each vehicle’s Voyager card number. The remaining AmerenUE vehicles in Missouri purchase fuel at the retail pump using the Voyager card.

Administrative law restricts the use of wet-hose fueling in Illinois, so managers at AmerenCILCO and AmerenIP utilize onsite tanks and card readers with the Voyager card to purchase bulk fuel provided by PS Energy Group, Inc.

Ad Loading...

“On the lot, one driver can fuel the truck while the rest of the crew prepares for a job,” he said. “At an outside fueling station, the rest of the crew has to wait while one crew member pumps fuel.”

Many of Ameren’s onsite fueling stations realize a cost benefit as a result of high volume. At the smaller sites, the cost benefits are more marginal.

Kretsinger pointed out that another significant financial savings with this type of program is having one interface and a centralized data collection point.

Ameren’s partnership with PS Energy, its bulk fuel provider based in Atlanta, has enhanced data centralization. PS Energy not only delivers the bulk fuel, but also manages transactions from the onsite facilities using card readers, then delivers them to Voyager, the centralized data point.

The third Illinois operating company, AmerenCIPS, does not have onsite tanks, but uses the Voyager card to purchase fuel at retail stations. Kretsinger said that their managers find that retail works well for them without making the capital investment for onsite facilities, especially in more rural and less concentrated areas.

Ad Loading...

Since all three models are tied to a single fuel card, Kretsinger receives one invoice a month, and he writes one check per month for all three models. “It makes administration and data analysis much more efficient,” he said. “All the transactions are electronic, and each transaction ties back to a vehicle without requiring manual data entry.”

Analysis Helped Define Ameren’s Fueling Needs

Ameren used co-branded cards tied to maintenance management companies before switching to Voyager in September 2002. After a successful pilot test using Voyager fuel cards at retail sites, Kretsinger rolled the program out to the entire fleet. Co-branded cards work for fleets that primarily depend on an outside fleet management vendor for data collection and analysis, according to Kretsinger. However, for Ameren’s fleet, it made more sense to conduct analysis in-house. “In our case, we bring data into our internal fleet management system, so it didn’t make sense for us to pay an additional fee for each card,” he said. “With a smaller fleet, it might make sense to farm out data management and analysis.”

Ameren uses this fleet data for regulatory compliance, internal billing, and to schedule preventive maintenance.

Ameren Reduces Fuel Costs After Partnering with PS Energy

Ameren’s partnership with PS Energy has led to further cost savings. “Because of the volatility of fuel prices, it’s important to plan for the future,” Kretsinger said.

The partnership began in fall 2005. PS Energy has helped Kretsinger anticipate industry trends and manage Ameren’s energy needs efficiently and cost effectively. According to Livia Whisenhunt, president and CEO of PS Energy, her company’s role is to help fleets create budget certainty and better asset accountability.

Ad Loading...

“Onsite fuel is certainly the most cost-effective option, especially when full deliveries are used,” she said.“Reducing the invoicing process cost, the number of vendors, and putting all of the data down to the asset level can lead to a substantial cost savings.”

PS Energy partners with fleet managers to lock in fuel prices for 30 days to one year, depending on specific company budgets and needs. Whisenhunt estimates that companies can save 5-30 percent in volume alone through better accounting and consolidation.

Southern Company Uses ‘Firm Pricing’ to Level Fuel Costs

The Southern Company is another fleet that currently partners with PS Energy. An investor-owned electric utility, Southern Company provides electric service to homes and businesses in Alabama, Georgia, Mississippi, and the Florida panhandle.

Southern Company’s fleet of approximately 10,000 vehicles includes cars, light- and medium-duty trucks, trailers, and mechanized equipment such as aerial devices and digger derricks.

According to Mark Johnson, procurement agent for Southern Company, PS Energy is responsible for monitoring and maintaining levels of fuel at the company’s 91 onsite fueling locations.

Ad Loading...

“PS Energy is responsible for reporting fuel usage information by vehicle number,” Johnson said. “They are also an integral part of Southern Company’s Storm and Emergency Restoration Plan.”

Southern Company also utilizes PS Energy’s “firm pricing” service.

“On occasion, Southern Company has chosen to contract at firm fuel prices rather than fluctuating market prices,” Johnson said. “The benefits include level fuel costs, removal of some pricing risks in the volatile fuel market, and some cost savings compared to the market.”

According to Johnson, a good “firm price” is established by reviewing the average price of a prior term, and considering conditions that will affect the next term. Johnson sold this strategy to senior management after a thorough analysis and presentation of the potential cost savings.

While onsite fueling works best for the Ameren and Southern Company fleets, Kretsinger, Whisenhunt, and Johnson agree that when implementing a fuel management plan, fleet managers should conduct a thorough analysis and cost comparison of all available programs and options.

Subscribe to Our Newsletter

More Operations

A blue Automotive Fleet graphic representing the weekly AF News Recap series.
Operationsby Faith HowellMay 4, 2026

From Waffle House to AI: Fleet Trends You Need to Know

In this AF news recap, host Faith Howell covers how Waffle House stepped up during disaster response and new AI tech on the market.

Read More →
OperationsApril 30, 2026

Fleet Operations in the Age of AI: Navigating Ethical and Legal Challenges

AI is no longer a future concept for fleets—it’s already embedded in the tools, data, and decisions that operators rely on every day. In this episode of the Fleet Forward Podcast, recorded live at Fleet Forward, industry leaders take the conversation beyond hype to examine what responsible AI adoption really looks like in fleet operations.

Read More →
OperationsApril 30, 2026

Factory Installed vs. Aftermarket: Choosing the Right Telematics Path & Managing the Data

As fleets rethink how they capture, manage, and act on vehicle data, telematics is at a major inflection point. In this episode of the Fleet Forward Podcast, we dive deep into one of the most pressing questions facing fleet leaders today: Should you rely on OEM factory-installed connectivity, aftermarket devices, or a hybrid of both?

Read More →
Ad Loading...
OperationsApril 30, 2026

What Real-Time Data Reveals About EV Cost, Performance, and Scalability

Experts from telematics analytics, fleet-as-a-service operations, and national EV benchmarking share how real-time data is reshaping fleet strategy—dispelling assumptions, validating best practices, and exposing costly missteps.

Read More →
OperationsApril 30, 2026

Planning Through Policy Shifts: What Fleets Must Track in 2026

A powerhouse panel featuring experts from the American Automotive Leasing Association, CalSTART, and municipal fleet leadership dives into the realities of navigating shifting emissions rules, regulatory waivers, federal agency actions, the future of the EPA’s endangerment finding, and the push for unified standards. They also examine the impacts of tariffs, autonomous vehicle policy, battery innovation, and the accelerating global EV market.

Read More →
OperationsApril 30, 2026

Managing Market Turbulence with Strategic Fleet Insights

This episode kicks off with a deep dive into the technologies and market forces reshaping today’s fleet landscape. Host Chris Brown is joined by Laolu Adeola (Leke Services), Tyson Jomini (J.D. Power), and Richard Hall (ZappiRide) to break down real-world data, shifting incentives, and practical strategies fleet leaders can use right now.

Read More →
Ad Loading...
Clipboards with flooded cars in background.
Disaster Responseby Chris BrownApril 30, 2026

Adapting Fleet Policy When Disasters Strike

In the middle of natural disasters fleet managers must shift priorities to protect people and assets. What policy items should be loosened, and when should the line be held?

Read More →
OperationsApril 24, 2026

EV Reality Check: How Fleets Are Managing Policy Shifts, Safety, and Scaling Challenges

In this episode, fleet leaders from municipal, university, and private-sector organizations share a candid EV reality check. From infrastructure setbacks and policy whiplash to grant funding, total cost of ownership, and charging resiliency, this conversation dives into what it actually takes to scale electrification in the real world.

Read More →
2019 Automotive Fleet Hall of Fame inductees Joe LaRosa Bob Miesen Bud Morrison Theresa Ragozine portraits
Operationsby StaffApril 21, 2026

Fleet Hall of Fame Honorees Through the Years

A running list of the fleet industry’s most influential leaders, recognized for their lasting impact on commercial fleet management.

Read More →
Ad Loading...
Operationsby Chris BrownApril 20, 2026

2026 Salary Survey: Six-Figure Fleet Manager Salaries Become the Norm

After a decade of lagging compensation, fleet manager pay is climbing. But expanding responsibilities, larger fleets, and growing complexity continue to redefine the role.

Read More →