Airlines worldwide are addressing the climate crisis by transitioning to more environmentally conscious practices. The International Civil Aviation Organization (ICAO) aims for carbon neutrality in aviation by 2050, necessitating a shift to alternative fuels like Sustainable Aviation Fuel (SAF) and electric aircraft. SAF, derived from sustainable sources, is deemed a 'drop-in' replacement for traditional Jet-A fuel, ensuring smooth integration with current engines and operations. Despite concerns about SAF's energy density and impact on fuel lines, the industry is optimistic about its potential to reduce emissions and maintenance costs. Concurrently, the aviation community is preparing for the phase-out of leaded aviation fuel, notably affecting piston-driven aircraft used in flight training. The push to eliminate lead, such as Tetrathyllead, poses challenges due to the unique performance characteristics of leaded fuel in providing stable power for aircraft engines. Transitioning to lead-free alternatives like diesel or Jet fuel necessitates adjustments, although early tests indicate comparable performance. Engine manufacturers have proactively modified their platforms to accommodate this change, underscoring the industry's commitment to sustainability and innovation in aviation fuels.