93 Ethanol or 91 Etahnol Free?

Redman440

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Hello, I was curios what your thought's were. I have a 2001 stock lightning and Turbo Cobra. The gas station has both 93 or 91 ethanol free. I was curious what you would run. I think the 91 ethanol would be the better gas even thought it is the lower octane. Just curios to here people opinion..
 

railroad

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On your cars, if the computer is adaptive, you might want to make a comparison. If not adaptive, whatever timing you have set, is what you get. 93 will have less chance of detonation, 91 non ethanol will produce more BTU's per gallon. You might get better mpg with it.
The 93 will probably be the fastest, if your timing is maxed.
 
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