Danny -

Your question is phrased incorrectly when you ask (paraphrased) "...is a mix of 2/3 mogas with 1/3 avgas a
viable mix for most LNC2 types".

Fuel octane requirements are engine, not airframe-specific. The simplistic answer is: Higher compression, higher octane (higher tetraethyl lead content) required to preserve adequate detonation margins. Use a fuel of unknown characteristics at your own (and your passenger's) risk.

Further, fuels containing an alcohol such as ethanol may be incompatible with the fuel system - just had to replace the Holley carb. on my boat (small-block Ford V-8) after about 8 - 9 years of gas with 10% ethanol content. Related? Don't know.

As the old saying goes: "Ya pays yer money and ya takes yer chances".

Dan Schaefer --
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