Does everyone use premium gas with the turbo? - Page 5 - TerrainForum.net: GMC Terrain Forum
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post #41 of 47 (permalink) Old 08-29-2019, 10:50 PM
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What about using 100% gas, we have easy access to it here in the South..
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post #42 of 47 (permalink) Old 09-11-2019, 06:20 PM
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Octane might actually be lower w/o ethanol for the same grade of gas? I hate to spend the money on premium but high compression, direct injection, turbo charging and small displacement add up to the need for it. I suppose the knock sensor will retard timing enough to protect the engine if 87 octane is used but I'd rather not rely on that system unless I have to. I make up for it by buying cheap wax for the paint instead of the 30 dollar a bottle magic wax.
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post #43 of 47 (permalink) Old 09-11-2019, 09:13 PM
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I understand your point. I read on the Corvette forum that using 100% (87) gas is actually higher rating than 89 E-10 gas..
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post #44 of 47 (permalink) Old 09-11-2019, 09:25 PM
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The higher the ethanol content, the higher the octane. The octane rating for E15 (15% ethanol) is 88 octane and E85 (85% ethanol) is 108 octane. Straight ethanol has an octane rating of 113 I believe
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post #45 of 47 (permalink) Old 09-11-2019, 10:13 PM
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Guess I'm just NOT a fan of ethanol because of what it does to small engines.
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post #46 of 47 (permalink) Old 09-12-2019, 12:03 AM
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Neither am I .... I can't stand the stuff but we're stuck with it. I have five gallon cans with non ethanol "rec" fuel for the lawnmower, chainsaw, leaf blowers etc. Around here, ethanol free gasoline is pretty expensive. The terrain is a daily driver so the ethanol laced fuel doesn't have time to go bad which I'm told can happen in just a few months.
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post #47 of 47 (permalink) Old 09-12-2019, 08:31 PM
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Around here 100% gas is priced good, so I use it a lot.

I've repaired friends Harleys' from the damages of ethanol to their carbs & rubber gas lines etc..
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