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pure 93 octane gasoline or ethanol added 93 octane gasoline

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Old 11-17-2011, 08:58 AM
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Question pure 93 octane gasoline or ethanol added 93 octane gasoline
which gets better mpg and which gets more power? pure ethanol free 93 octane gasoline or 10% ethanol 93 octane gasoline
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Old 11-17-2011, 09:14 AM
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Old 11-17-2011, 09:26 AM
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Better MPG is non oxy 93. (Pure)

Having ethanol in there helps with knock so in theory the 10% helps with more power.

You will get more timing out of 10% ethanol.
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Old 11-17-2011, 09:31 AM
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If you aren't tuned you would get the same power. Pure gas will get better mileage.
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Old 11-17-2011, 09:51 AM
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Also if you are tuned and had 10% while tuning you could see knock if you use non oxy (pure)
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Old 11-18-2011, 05:08 PM
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Where have you found pure 93 ? I havent seen it in a long time in ny .
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Old 11-18-2011, 11:10 PM
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I think its a federal law that all gasoline must have 10% ethanol by volume.
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Old 11-18-2011, 11:37 PM
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Only have 91 around me. But I know the phillips 66 stations have pure gas and just about everything else is 10% ethinol added.
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Old 11-18-2011, 11:39 PM
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Ryland theres a sunoco on SR60 in brandon sells 93 no ethenol.
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Old 11-19-2011, 12:38 AM
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Ethanol has less energy than gas but is more resistant to knock. Better gas milage on pure gas
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Old 11-19-2011, 02:16 AM
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0 knock EVERY tune since day 1 on 93oct using the official fuel of nascar.
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Old 11-19-2011, 02:27 AM
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Originally Posted by 06SS ALL DAY
0 knock EVERY tune since day 1 on 93oct using the official fuel of nascar.
go lower then a 2.9 and you will see some
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Old 11-21-2011, 07:05 AM
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The station I purchase my race gas at sells Ethanol free gas.
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Old 11-22-2011, 09:56 AM
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I remember when a Sunoco by me used to sell 94 octane.
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Old 11-26-2011, 03:49 PM
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Originally Posted by Prestige_Worldwide
I remember when a Sunoco by me used to sell 94 octane.
Yep.... we had it here too . Thats all i used to run in my Z and Nova..... it was like 7 cents more a gallon than 93 so it wasn't expensive
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Old 11-27-2011, 04:51 PM
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i wouldnt pay 7 cents more for 1 octane
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Old 11-28-2011, 03:29 PM
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Originally Posted by nhanson
i wouldnt pay 7 cents more for 1 octane
for a 12 gallon cobalt tank its only an extra .84 cents more to fill the tank I would take the extra octane for that.
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