Can someone explain to me what it means when the name plate on my Lycoming says the Octane rating is 91/96? Recently a few gas stations in my area are selling high test fuel 93 octane ethanol free. It's $3.05 a gallon, lots less than the $5.00 for aviation fuel. Was thinking of mixing half and half. Good idea? or bad?
Thanks in advance
Richard
Thanks in advance
Richard