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#1
April 4th 07, 02:26 AM
posted to rec.aviation.homebuilt
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Volatility Question about Mixing Fuels
My understanding is that 100LL has a relatively low volatility to reduce the
chance of vapor lock. Whereas Mogas often has a higher volatility. With this in mind, what happens to the volatility if I mix 50% 100LL with 50% Mogas? Is the volatility of the mix the straight average of the two fuels, or is the net volatility higher than the straight average? Why do I ask? I'm considering running a "mix" in the RV-6 to save a few bucks. The FBO at my home field charges about $2.00/gallon more for 100ll than the nearby station charges for 93 octane, so a couple of 5 gallon tanks worth of fuel will save me $20 bucks. 
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