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93 with or 91 without ??????

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Old 08-02-2014, 09:59 PM
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fjrgary
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Default 93 with or 91 without ??????
got my choice of 93 octane with ethanol or 91 octane with out. which would you use??? engine is an LS3. thanks gary.
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Old 08-02-2014, 10:03 PM
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MKenM
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For me it would be whichever is the Top Tier gas.
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Old 08-02-2014, 10:15 PM
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1rusty1
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If I can get non eth 90 and above, I go with that.
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Old 08-02-2014, 10:22 PM
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Tonylmiller
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If price and quality are similar, I'd go for the pure 91. You will get better mileage and the octane is probably high enough.
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Old 08-02-2014, 10:31 PM
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red2012
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You will probably get 2-3 mpg better with the pure gas. I know with my '13
GS I do because I have clocked it with both kinds of gas on the exact same road driving the exact same way ( 65mph ) for the exact same distance.
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