Many industry fleet owners already understand that propane autogas can generate better savings than other fuels. So, what happens when six industry trucks — three diesel, three propane autogas — go head to head in a savings comparison? This report examines that exact scenario, featuring vehicles operated by Blossman Gas. The company tracked and supplied the data for this comparison, and a detailed cost analysis was conducted.


To make a fair and informative evaluation, this analysis compares six similar trucks, all within two model years of each other.


Between 2016 and 2020 the company recorded two important data points:

  1. How much fuel the vehicles consumed during their lifecycle.
  2. How many miles they traveled within that timeframe.

This produced an accurate miles-per-gallon calculation for each vehicle. Records were also collected on the preventative maintenance and repairs of the engines and fuel systems.


Across the board, propane autogas was better for the company’s bottom line than diesel in both fuel and maintenance savings.


When examining the fuel expenses for the vehicles, fuel for the propane autogas vehicles cost the company less than fuel for the diesel vehicles. In fact, the average fuel price per mile for propane autogas was less than half of that for diesel.


To compare maintenance costs, all invoices were collected for every preventative maintenance service as well as all engine and fuel system related repairs. This included diesel particulate matter filter replacements and diesel exhaust fluid, as well as propane fuel pump replacements. Even on a per mile basis, the maintenance costs of diesel far outpaced those for propane autogas.

The data collected on these two nearly identical vehicles offers propane industry fleet managers a clear reason to switch to propane autogas — it’s better for your bottom line, and for the industry.

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