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93 octane not available. HELP #5320803 01/12/20 02:24 PM
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dbvettez061 Offline OP
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I live in western Colorado, elevation 4500 feet. I cannot find 93 octane here for my new ZL1 Camaro. Ideas appreciated.

Last edited by dbvettez061; 01/12/20 02:25 PM.

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Re: 95 octane not available. HELP [Re: dbvettez061] #5320804 01/12/20 02:25 PM
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Marco620 Offline
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You don't need that high of an octane at that high of an elevation


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Re: 95 octane not available. HELP [Re: Marco620] #5320813 01/12/20 02:34 PM
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Rolla07 Offline
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Originally Posted by Marco620
You don't need that high of an octane at that high of an elevation


+1

Just use the highest octane available where you are. Can you get 91?


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Re: 95 octane not available. HELP [Re: Marco620] #5320822 01/12/20 02:39 PM
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Virtus_Probi Offline
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Originally Posted by Marco620
You don't need that high of an octane at that high of an elevation

I noticed that some high altitude locations sell 85 as a base grade instead of 87.
I would also avoid using any aftermarket octane boosters without doing some research first, I did this once and was really unhappy when I looked up what was in the STP stuff I had bought. They also tend to do very little actual octane boosting...


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Re: 95 octane not available. HELP [Re: dbvettez061] #5320825 01/12/20 02:40 PM
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As noted above. Don't worry, be happy


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Re: 95 octane not available. HELP [Re: dbvettez061] #5320873 01/12/20 03:42 PM
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slacktide_bitog Offline
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91 will be fine smile

You could also use one of those octane boosters hide

Re: 95 octane not available. HELP [Re: dbvettez061] #5320884 01/12/20 03:56 PM
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gathermewool Offline
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93 isn't available in all sea-level states. 91 is fine.


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Re: 95 octane not available. HELP [Re: Marco620] #5320888 01/12/20 04:02 PM
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ammolab Offline
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Originally Posted by Marco620
You don't need that high of an octane at that high of an elevation


On a normally aspirated engine? Absolutely....... But his Zl1 is supercharged. Under max boost he may want 93 octane. No big risk as knock sensing is very protective these days.

Use the 91 and accept a bit of power loss at WOT.

California only has 91 octane at every elevation, sea level even. Those guys run 91 in their supercharged GM V-8s, Your tune may not need 93 octane or benefit from it.

Last edited by ammolab; 01/12/20 04:05 PM.

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Re: 95 octane not available. HELP [Re: dbvettez061] #5320900 01/12/20 04:12 PM
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Linctex Offline
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You can buy VP unleaded racing gasoline (it's expensive - like $6 - $8 a gallon) in 5 gallon cans, and add some to each tank once you arrive at your home.


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Re: 95 octane not available. HELP [Re: dbvettez061] #5320957 01/12/20 05:25 PM
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mattwithcats Offline
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I have been buying Sunoco Race Fuel 260 GTX from Richmond Raceway...

98 Octane, no lead, no ethanol, no metallic additives...

One quart in 5 gallons 87, cheapest octane booster I can find...

https://www.sunocoracefuels.com/fuel/260-gtx

Last edited by mattwithcats; 01/12/20 05:26 PM.

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Re: 95 octane not available. HELP [Re: dbvettez061] #5320975 01/12/20 05:47 PM
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Mr Nice Offline
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Knock sensor will retard engine timing so no need to worry.

Re: 95 octane not available. HELP [Re: mattwithcats] #5320981 01/12/20 06:06 PM
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DaleRider Offline
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Originally Posted by mattwithcats
I have been buying Sunoco Race Fuel 260 GTX from Richmond Raceway...

98 Octane, no lead, no ethanol, no metallic additives...

One quart in 5 gallons 87, cheapest octane booster I can find...

https://www.sunocoracefuels.com/fuel/260-gtx



Just curious, but what do you think you're really accomplishing with that mixture? From doing the math, 1 qt of 98 octane plus 19 qts of 87 octane to create a 20 qt (5 gal) mixture gives a final octane rating of 87.55. Since you're not raising the octane much at all, what's the point?

Re: 95 octane not available. HELP [Re: dbvettez061] #5320983 01/12/20 06:07 PM
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eljefino Offline
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Toluene is an option.

Re: 95 octane not available. HELP [Re: DaleRider] #5321056 01/12/20 07:39 PM
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Astro14 Offline
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Originally Posted by DaleRider
Originally Posted by mattwithcats
I have been buying Sunoco Race Fuel 260 GTX from Richmond Raceway...

98 Octane, no lead, no ethanol, no metallic additives...

One quart in 5 gallons 87, cheapest octane booster I can find...

https://www.sunocoracefuels.com/fuel/260-gtx



Just curious, but what do you think you're really accomplishing with that mixture? From doing the math, 1 qt of 98 octane plus 19 qts of 87 octane to create a 20 qt (5 gal) mixture gives a final octane rating of 87.55. Since you're not raising the octane much at all, what's the point?





Is the relationship between octane and chemical composition strictly linear?

I suspect it’s not...


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Re: 95 octane not available. HELP [Re: dbvettez061] #5321071 01/12/20 07:52 PM
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Audios Offline
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91 will work, otherwise maybe look around for bulk purchases of octane boost?


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