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What’s the financial outcome when a propane autogas vehicle and diesel vehicle — nearly identical in every way except for fuel — are tracked for cost-of-ownership over their lifecycles? It’s well known that propane autogas vehicles can significantly lower costs by providing fuel and maintenance savings. But a side-by-side comparison with a similar diesel fleet — running comparable routes in the same region — has never been documented until now.

Data was supplied by Superior Plus Propane in Rochester, New York. Then, a detailed cost analysis was conducted comparing propane autogas Ford F-550 trucks to similar diesel vehicles.


To make a fair and informative evaluation, four trucks were compared that were similar in almost every way — two propane autogas models and two diesel models equipped with the same body and within just one model year of each other.


Between 2015 and 2020, the study tracked and compared two important data points: 1) how much fuel the vehicles consumed during their lifecycle, and 2) how many miles they traveled within that timeframe. That produced an accurate miles-per-gallon calculation for each vehicle.

In addition, records were collected on the preventative maintenance and repairs of the engines and fuel systems in order to factor maintenance costs into the equation.


Across the board, the propane autogas trucks delivered bottom-line benefits that diesel models couldn’t match — specifically with maintenance and fuel costs.

These numbers validate the savings that propane industry fleets can achieve after switching to propane autogas. When multiplied across thousands of miles and an entire fleet of vehicles, the savings add up fast.

Download the full case study for a more detailed analysis of the data.

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