Fuel-price spread sharpens business case for propane autogas

October 5, 2026 By Keith Loria 0 Comments

▶ Maintenance widens diesel gap

Autogas fuel delivers the clearest savings over gasoline. Denton cautions against overstating the maintenance difference between the two spark-ignited platforms and recommends following the same disciplined service schedule.

“If you look at gasoline versus propane, the maintenance is going to be pretty comparable,” Denton says. “The difference between a gasoline and propane vehicle is primarily fuel cost.”

The comparison changes when propane displaces diesel. Diesel exhaust fluid, regeneration systems and more complex aftertreatment can add service expenses and downtime. Roush CleanTech’s spark-ignited propane platform eliminates diesel exhaust fluid, turbochargers and diesel aftertreatment, Mouw says, while also expanding the pool of technicians capable of servicing the vehicle.

Stutheit, a former transportation director, points to routine service as another source of savings. A diesel application may require 18 to 20 quarts of oil and more expensive fuel and oil filters, while a comparable propane vehicle may need about eight quarts and a conventional automotive oil filter. The propane fuel-system filter is relatively inexpensive and typically replaced around 50,000 miles, he says.

Denton cites Mobile County Public Schools in Alabama as evidence of the cumulative effect.

“When you look at a diesel school bus and all the exhaust equipment – the regeneration system and diesel exhaust fluid – we are saving considerable money on maintenance with propane versus that diesel bus,” Denton says. “Mobile County Schools has over 350 propane buses. They’re saving around $2,000 per year per bus on maintenance and another $1,000 per bus on fuel cost.”

That puts the fleet’s combined annual savings at approximately $1.05 million.

▶ Address infrastructure early

Fleets still need answers about refueling, service, training and implementation speed, Mouw says.

Private infrastructure fits fleets whose vehicles return to base. A marketer can lease the equipment and incorporate the expense into the fuel price, reducing the customer’s initial capital requirement. The customer generally prepares the site.

“It all starts with a conversation with the propane retailer or marketer about the fleet’s business case,” Stutheit says. “The infrastructure can be leased instead of purchased, and that lease price can be wrapped into the fuel price.”

PERC offers materials covering vehicle platforms and upfit systems certified by the U.S. Environmental Protection Agency and California Air Resources Board. Roush CleanTech examines whether each prospect uses its own garage or an outside fleet-management provider.

“We spend a lot of time understanding how they get maintenance done today and then replicating that for propane,” Mouw says. “We are not asking them to do anything different from what they are doing today.”

▶ Turn the retailer fleet into evidence

Propane retailers understand the fuel, possess supply relationships and may already have suitable storage and service expertise.

Mouw says a retailer buying propane at its own cost can save well beyond 30 cents per mile against diesel, even before the latest price spread.

Blossman Gas, a founding member of Alliance AutoGas, demonstrates how far a retailer can take the strategy. Denton estimates 75 percent to 80 percent of its fleet runs on autogas.

That share does not include every bobtail. Denton draws a distinction between the service, sales and administrative vehicles that can readily use propane and delivery trucks assigned to mountainous territory or heavy loads for which the available gasoline-based platform may not meet an operator’s requirements.

“Let’s talk about everything except your gas delivery truck,” Denton says. “You could run your administrative vehicles, pickup trucks, sales vehicles and service vehicles on propane.”

Starting with those suitable vehicles gives a retailer more than internal savings. It creates a demonstration fleet. Denton will take an autogas pickup to a prospect operating similar trucks, allow the fleet manager to drive it and, when appropriate, leave it for several days. The customer experiences the range, payload and performance rather than relying solely on a spreadsheet.

Stutheit sees the same two-part return: The retailer lowers its operating costs while placing an example in front of future users. Each conversion also adds gallons to the marketer’s business.

High conventional-fuel prices may open the door, but a retailer’s operating data can sustain the conversation after prices change. Marketers can begin with high-consumption vehicles that fit, document the results and use them to demonstrate the product they want customers to buy.

“It’s hard to convince somebody to do something you don’t do,” Denton says. “We live what we preach. We drive propane vehicles.”

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