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Unleaded Fuel

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Key Takeaways:

  • Over 65 percent of the private, single-engine piston fleet can use mogas with an STC, offering significant savings on fuel and maintenance costs compared to 100LL, and reducing lead-related engine issues.
  • Pilots should diligently monitor cabin carbon monoxide levels; 10 PPM lasting for minutes warrants investigation, while 35 PPM or rapidly rising levels necessitate an emergency landing and the use of oxygen.
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Thank you for Jeb Burnside’s “Follow the Money” commentary in the April 2022 issue. I’d like to highlight another aspect of the leaded-avgas issue that aviation’s “alphabet soup” hasn’t called much attention to.

According to the EAA’s own hardcopy STC materials (but not emphasized on the EAA or AOPA web sites), “more than 65 percent of the privately owned, single-engine, piston fleet of aircraft in the United States still utilize 80 octane rated gasoline.”

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