04-05-2016, 08:45 PM | #1 |
Drives: 2014 ZL1 Join Date: Apr 2016
Location: Iowa
Posts: 28
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Octane required
Sorry if this is answered somewhere, but did not find it.
The best I can find in central Iowa is 91 octane, supposedly ethanol free. Any issues with in comparison with 92 or 93 octane? talking stock, no mods. Thanks, Mike |
04-05-2016, 08:47 PM | #2 |
HAMMER PILOT
Drives: 13 ZL1#182, 85 CJ7, 16 Silverado Join Date: Nov 2011
Location: Tucson AZ
Posts: 4,386
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93 is better, all we have is 91 in Arizona but the car will run great on 91. It automatically adjusts to the octane level.
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04-05-2016, 09:02 PM | #3 |
Drives: 2018 ZLE Join Date: Jul 2014
Location: United States
Posts: 454
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I know a lot of folks swear by 93, but in CA all we have is 91 and my car runs great. All I hear is how crappy the gas is here, and maybe because I live here it's all I know, but the car feels pretty damn quick to me. If I had access to 93 obviously I'd be all over it. If your question is about hurting the car I wouldn't give it a second thought. It says right in the book that 91 is fine.
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04-05-2016, 09:16 PM | #4 |
Drives: 2014 ZL1 Join Date: Apr 2016
Location: Iowa
Posts: 28
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Thanks guys. Not so much worried about hurting car, but I like to but the best gas in I can, but did not want to drive 100 miles to find it, lol
Looks like 91 it is for me |
04-06-2016, 08:19 PM | #5 |
Drives: 2013 ZL1 Join Date: Jul 2013
Location: Iowa
Posts: 25
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93
I used to be able to get 93 in Nevada but they quit and now found it in Legrand. I just buy a 55 gallon barrel at a time and use a pump to get it into my car(and snowmobiles).
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04-06-2016, 08:49 PM | #6 |
KaBoom1701
Drives: 13' ZL1 Red M6 Join Date: Dec 2012
Location: I.E. SoCal (Yucaipa)
Posts: 8,630
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Torco
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Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats. |
04-06-2016, 10:07 PM | #7 |
Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012
Location: Southeast
Posts: 1,838
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Your car will run fine on 91 octane. But if you check for knock retard you will find some timing is being pulled. It won't harm the engine, but it won't make it's max power either. May lose 25-50 horsepower depending on how much timing is getting pulled.
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Bryan 2018 ZL1 M6
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04-06-2016, 10:11 PM | #8 |
Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012
Location: Southeast
Posts: 1,838
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Also you say the best you can find is 91 ethanol free. If you can find 93 octane with ethanol that would still be better. Ethanol doesn't hurt. It raises octane. But ethanol added will get worse fuel economy.
I'd rather have the power and lose a couple MPG.
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Bryan 2018 ZL1 M6
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04-07-2016, 11:42 PM | #9 |
Drives: 2014 Camaro Zl1 Tripple Black! Join Date: Nov 2014
Location: Iowa
Posts: 383
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Actually 91 with ethanol is better than 91 no ethanol. I am datalogging with Ted right now and using 91 no ethanol Made me take out timing.
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04-07-2016, 11:58 PM | #10 |
Raging Bull Reborn
Drives: '09 CGM Z063LZ '15 RH Z/28 #0631 Join Date: Mar 2012
Location: Broken Arrow OK
Posts: 765
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if you're beyond warranty a half quart of torch accelerator into 16 gallons of 91 octane unleaded gives 93 octane all day long...its what I use in Oklahoms to get 93 octane out of the 91 octane gas we have.
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04-08-2016, 10:56 AM | #11 |
HAMMER PILOT
Drives: 13 ZL1#182, 85 CJ7, 16 Silverado Join Date: Nov 2011
Location: Tucson AZ
Posts: 4,386
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Why would you need to be beyond warranty?
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04-08-2016, 11:37 AM | #12 |
Drives: 2012 ZL1 Join Date: Apr 2015
Location: Kitchener ON, Canada
Posts: 176
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I guess I'm lucky ! Here in southern Ontario we have ultra 94 octane available, I put it in every time!
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04-08-2016, 11:51 AM | #13 |
Drives: 2015 Camaro 1LS Red Rock Join Date: Dec 2015
Location: Columbus, OH
Posts: 121
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I didn't know high octane gas was so hard to find in other states. Sunoco has 94Ultra here in Ohio. I guess not all Sunoco's in Ohio have the 94 but the one in my Columbus suburb does.
The irony here is that my car doesn't need it so I don't buy it. |
04-08-2016, 11:52 AM | #14 |
Drives: 2013 ZL1 LSA Victory Red Join Date: Dec 2013
Location: Charlotte, NC
Posts: 12
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I used to love in Colorado and Washington State, and you couldn't find 93 there. Here in Charlotte 93 is everywhere and the place across the street from my house has 100. Kind of afraid of the 100 though, and its about 6 bucks a gallon for some reason.
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