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Old 05-08-2011, 02:44 PM   #1
Phil_Dunphy
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2011 WRX STI 4D
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Default Forced to use 92 Octane w/ AP 93 Octane Stg1 Map

I'm not sure if this is the right forum but I did search and couldn't find my answer:

I am running the AP Stage 1 93 Octane tune right now and on my way home today from Atlanta I had to stop at a very rural exit to get gas. The highest the station had was 92 Octane (I've always used 93, no fail in the past). I prepaid for the gas in cash already so I couldn't really leave, plus the line was long as hell to the cashier for some reason. With that said I filled it up with 92 and just stayed off boost the entire drive home and kept it out of the sport sharp mode.

I do realize after the fact I could have loaded the 91 octane map for this situation but I didn't think of it at the time. My question is: Is what I did ok? Can this hurt anything? I knew better to stay off the gas but I want to make sure I don't have anything to worry about.
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Old 05-08-2011, 02:51 PM   #2
SWP n Gold
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Quote:
Originally Posted by Phil_Dunphy View Post
I'm not sure if this is the right forum but I did search and couldn't find my answer:

I am running the AP Stage 1 93 Octane tune right now and on my way home today from Atlanta I had to stop at a very rural exit to get gas. The highest the station had was 92 Octane (I've always used 93, no fail in the past). I prepaid for the gas in cash already so I couldn't really leave, plus the line was long as hell to the cashier for some reason. With that said I filled it up with 92 and just stayed off boost the entire drive home and kept it out of the sport sharp mode.

I do realize after the fact I could have loaded the 91 octane map for this situation but I didn't think of it at the time. My question is: Is what I did ok? Can this hurt anything? I knew better to stay off the gas but I want to make sure I don't have anything to worry about.
You're good. At least you didn't beat on it with the 92 in there. Some people have accidentally put 87 in so you're not in the worst position. Run it down to empty and get 93 back in there and you're all set.
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Old 05-08-2011, 02:51 PM   #3
MSMStannyl
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I had the same thing happen to my 2011 WRX. I'm currently running the Cobb AP with a Torqued Performance map for Stage 1 (93 Octane) + AEM Intake. Everywhere around here 93 octane is readily available. However, a couple weekend ago, I was in a different area, needed gas, and the highest octane they had was 92. Obviously I didn't have a choice so I used it, although I only put in enough to get home (and I still had a little 93 left in the tank). In any case, I had no problems whatsoever. I only drove it for maybe 25 miles before getting back to my area and filling the rest up with 93. Like I said, no issues at all. I asked someone about this and they said it shouldn't be a big deal.

From what you posted, it sounds like you may have filled it up all the way. Personally, I would've done what I did and put in just enough to get you somewhere where 93 is available but again, most likely no harm done. Hopefully someone with more knowledge on the subject can give some input.
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Old 05-08-2011, 02:52 PM   #4
SWP n Gold
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^ Clear your inbox; I tried replying to you
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Old 05-08-2011, 04:24 PM   #5
Phil_Dunphy
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Thanks guys. I still have 3/4 of a tank of this crap to burn I just noticed. Sounds like this is a good tank to see if I can hit 23 mpg! haha
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Old 05-08-2011, 04:39 PM   #6
wayward167
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I've had to run 91/92 on my 93 tune....

I would stay out of boost and it should be ok. I asked my tuner and that's what he told me.

Didn't notice a difference the few times I had to give it a little pedal.
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Old 05-08-2011, 04:58 PM   #7
Lazer84
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I had this happen to me as well. My solution? I put in bottle of octane booster that I got from the station and it ran just fine. Boost and all. Fortunately all of that 92 junk is out of my system now
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Old 05-08-2011, 07:43 PM   #8
allroy81
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Quote:
Originally Posted by Lazer84
I had this happen to me as well. My solution? I put in bottle of octane booster that I got from the station and it ran just fine. Boost and all. Fortunately all of that 92 junk is out of my system now
That octane booster doesn't do anything it's like .000001 octane. That's an exaggeration of course but you get the basic idea.
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Old 05-08-2011, 07:55 PM   #9
ChrisTahoe
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Quote:
Originally Posted by allroy81

That octane booster doesn't do anything it's like .000001 octane. That's an exaggeration of course but you get the basic idea.
It actually depends on the main ingredient of the octane booster, how much octane booster is used, and how much fuel it is added to. Depending on the octane booster, it is feasible to turn 91 octane into 93.
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Old 05-08-2011, 08:10 PM   #10
philly15
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if you go on cobbs website they list the fuel requirements in the map notes of each map i believe it says the 91 oct tune is good for 91 or 92 and the 93 oct tune is good for 93 and 94 dont quote me on that though but generally if you were to take it easy you should be fine i think i had to do that once when i was using an ap the only thing that really changed was my car idled a little higher than normal and i checked it with learning view after driving around for a while and there wasnt any crazy knock events or anything lol but the idle afrs were a little off
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