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Old 03-10-2005, 06:17 PM   #1
emnm79
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Default Mixing gas?

Ok, i'm cheap, I know, I don't want to hear the "if you can't afford the gas you're in the wrong car" piss, don't start.

With that said, i'm wondering if mixing gas would work, ie: filling up with 94, when down to 1/2 tank fill up with 89, when down to 1/2 tank fill up with 94, etc etc... just a rotation between 89 and 94/93. Would this work/mix etc? there is no 91 around here and 94 is $$$ compared to the 89 over time.
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Old 03-10-2005, 06:26 PM   #2
Kean
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Yes.....you can blend two grades to achieve 91. An example would be a mix of 9 gallons of 89 and 7 gallons of 94 which would equate to just over 91 octane. You would just have to do the math on whether or not there is a cost savings big enough to go through this hassle. Anyhow, I can e-mail you an Excel spreadsheet that will calculate different blends if you want. ....just pm me.
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Old 03-10-2005, 06:30 PM   #3
main
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wish cali had 94...
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Old 03-10-2005, 07:18 PM   #4
asmallsol
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its good unless you have a car that just requires 91 (aka basicly stock, or a stock swap). in that case, it sucks.
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Old 03-10-2005, 07:46 PM   #5
WolfInSheepsCLothing
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mixing gas will work, but IMO, you need to drive your car at least 15 miles before you can expect that gas to be going through your injectors. i found a station that sells racing gas: 111 octane! so i put 5 gallons of it in and filled up the rest of the tank with 91 and ended up with 97-ish octane. i'm running cat-less, so i could easily smell the racing fuel from the exhaust, my car would stink the most after about 15 miles, but it was a beast! that was when i had a just a TBE, STi uppipe and no EM. when the gas was gone, my car felt like it was "sluggish" as the timing went down... now that i have accessport, i feel the same kind of pull (and a little more) from regular CA 91 oct...

it's a linear equation: [(111 octane*5 gallons)+(91 octane*10.9 gallons)]/15.9 gallons= ~97.2 octane
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