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.

Ad Loading...

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

Automotive Fleet video thumbnail featuring Jamie McKay alongside a male interviewer, with the headline “Jamie McKay Gives Fleet a Voice With Her Company’s Leadership” against a blue and black background.
Operations•by Chris Brown•November 4, 2026

How 2026 Fleet Visionary Jamie McKay Manages 2,400 Vehicles Across 37 States

How do you keep 2,400 vehicles running across 37 states? Fleet Visionary Award winner Jamie McKay shares how collaboration, flexibility, and a few simple strategies help her tackle fleet management challenges at Aptive Pest Control.

Read More →
Fleet operating costs for 2026 over image of a service center
Operations•by Chris Brown•November 1, 2026

Managing Fleet Costs in an Era of Permanent Volatility

Fleet operating costs have risen more than 20% since 2020, raising a key question: When does extending a vehicle's service life stop making financial sense?

Read More →
An Automotive Fleet podcast thumbnail
Operations•October 29, 2026

The Next Evolution of Fleet Management: Autonomous Operations

This opening keynote session at the Fleet Forward Conference highlights the future of autonomous driving for fleets.

Read More →
Ad Loading...
A picture of a transparent catalytic converter with blue text and the Automotive Fleet logo on the top.
Operations•October 29, 2026

How to Reduce the Total Cost of Risk From Catalytic Converter Theft

A stolen catalytic converter can cost fleets far more in downtime and lost productivity than in repairs. A total-cost-of-risk approach can help fleet managers quantify their exposure and prioritize theft prevention.

Read More →
AF news recap thumbnail
Operations•by Faith Howell•October 26, 2026

Personal-Use Charges Rise as Vehicle Values Fall | AF News Recap

Personal-use charges are climbing, wholesale used-vehicle values are declining, and commercial fleet sales growth is slowing. This week, we're breaking down the latest fleet data, plus how Element Fleet Management is helping Waymo prepare for its first Canadian robotaxi market.

Read More →
A transparent blue background of a hand stamping a paper is the background of text that says "What about fleet policy exceptions?" with the Automotive Fleet logo in the bottom right corner.
Operations•by Faith Howell•October 20, 2026

Here's When You Should Make an Exception to Fleet Policy

Fleet policies are designed to create consistency, but not every driver or situation fits neatly within standard rules.

Read More →
Ad Loading...
A hand writing on an ipad with a transparent AI graphic over it
Operations•October 20, 2026

AI-Native or AI-Acquired: What Should Fleet Managers Look for in an AI Platform?

Six questions can help fleet managers look beyond AI marketing claims to evaluate integration, data access, and real-world operational performance.

Read More →
Chevin 2026 Buyes Guide cover
Sponsored•October 14, 2026

A buyer's guide to fleet management software in 2027

Buying fleet management software in 2027 means looking beyond features and price. As fleet operations, technology and expectations evolve, this guide explores what today’s fleet professionals should consider when choosing a system that can deliver value now and adapt to what comes next.

Read More →
An overhead image of a freeway system with no vehicles
Sponsored•by Shelley Mika•October 13, 2026

What Will Shape the Next Era of Fleet Management?

EVs, AI, and autonomous vehicles are reshaping fleet management. Discover what’s ahead—and how fleet leaders can prepare for the next era.

Read More →
Ad Loading...
A Cox Fleet technician working on the left with the rear view of a military man saluting a flag on the right
Operations•October 8, 2026

How Fleets Can Recruit and Train Veterans for Technician Roles

Here's how the technician shortage has affected uptime for fleets, and what to do about it.

Read More →