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Old 08-27-2012, 06:55 PM   #1
P3Auto
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Default 91 octane available at Garrets Tesoro in anc

I have not checked this but a good source tells me that there is 91 at the pump at Garrets Tesoro in anchorage. Anyone know or try the stuff yet...Sure I realize its only one point and its Tesoro gas but it could be better, only tests and logging will tell.

Seth
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Old 08-27-2012, 07:21 PM   #2
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Man, I JUST filled up with Shell last night! I will wait to see who bites down on this one...
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Old 08-27-2012, 07:23 PM   #3
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I'll roll by and see on my way home.
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Old 08-27-2012, 07:31 PM   #4
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Do some before and after logs with an on the edge tune!

Obviously air temps and out door conditions will play a role but one "real" point of octane is truly worth a lot when your slapped with questionable 89-90 to begin with.

I think anyone with an AP or tactrix cable could do some basic logs to see if the stuff is better or worse then say shell or chevron 90. I think you guys would want to try logging feed back knock correction under different conditions with the 90 then try the 91 and do the same. Look and see if you see less timing trims being made overall. You would also want to make sure your IAM/DAM is already happy for both tests (1 or 16).

Kinda crude but for those running off the shelf 91 maps the 90 up here seems to be edgy in some areas of the tune however the ECU self tunes a bit with the feed back. Ultimately you would want to see less knock correction and less remembered values in the knock learned tables.

If I get a change I will fill the shop WRX up with some and test in depth.
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Old 08-27-2012, 08:09 PM   #5
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I need gas today. I'll swoop by and see if that's a true story or not.
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Old 08-27-2012, 08:45 PM   #6
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I called them and they said they did. Hmmm. Kyle - I have my tactrix cable and laptop with me today.. I say put some 90 from chevron in, we'll go datalog, and then put the "91" in and compare.

Sounds like a monday night adventure to me!!
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Old 08-27-2012, 08:52 PM   #7
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thats the tesoro by arctic and international intersection? i went there to fill up my S2 befor i sold it and didnt see 91 octane. just regular and diesel? maybe i didnt look hard enuff
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Old 08-27-2012, 08:52 PM   #8
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I'd be down.
Perfect too cause my gas light is on, so we'd be able to cycle the fuel quickly.
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Old 08-27-2012, 08:53 PM   #9
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Originally Posted by kyletakahero View Post
I'd be down.
Perfect too cause my gas light is on, so we'd be able to cycle the fuel quickly.
See you when I get off work then!
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Old 08-27-2012, 09:00 PM   #10
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If you guys are using tactrix cable grab a screen shot from learningview.exe before fill up. reset the ECU then start driving on it for a while. After your out of gas do the 90 octane and reset ecu. Drive around a bit to get the IAM or DAM back to 1.0 or 16 depending on ecu...Log feed back knock correction, rpm, and calculated load with both fuels and try to duplicate air temps when logging. If there is a real difference you should see it. If its to close to tell then it is what it is or your tune is just conservative enough to not care about more octane.
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Old 08-27-2012, 09:01 PM   #11
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For whatever it's worth, Kyle's car is bone stock, so it probably won't care either way.
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Old 08-27-2012, 09:02 PM   #12
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If you're going there, talk with them and see if they are able to order even higher octane fuel in their regular quantities. Seems to me that if you can get 91 octane from a source, 92-95 octane shouldn't be too much more of an issue. There is certainly a market for it here. I'd be happy to pay .25-50 cents more per gallon for higher octane.
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Old 08-27-2012, 09:05 PM   #13
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I have seen bone stock cars with learned negative timing values, also have seen them not make peak advance multiplier. The initial look at his learned and current vales would be useful. Otherwise you may be correct.

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For whatever it's worth, Kyle's car is bone stock, so it probably won't care either way.
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Old 08-27-2012, 09:06 PM   #14
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Hmm, I guess I should wait till I go stage 2 then?
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Old 08-27-2012, 09:29 PM   #15
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I was planning on resetting Kyle's ECU before logging the chevron 90 and reset it again before logging the 91 and logging RPM, IAM, FLKC, FKC, Calculated Load, and probably Ignition Total Timing.

I can do another log prior to reset to see if there are any FLKC values too.

Assuming that it is indeed true that our 90 sucks a big fat one, I'm sure there's some knock correction stored in Kyle's ECU, regardless of being stock. ;-)
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Old 08-27-2012, 09:32 PM   #16
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Put the 91 in a 5 gal can and empty the rest of the 90 out of the tank and lines?
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Old 08-27-2012, 11:31 PM   #17
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Quote:
Originally Posted by P3Auto View Post
Do some before and after logs with an on the edge tune!

Obviously air temps and out door conditions will play a role but one "real" point of octane is truly worth a lot when your slapped with questionable 89-90 to begin with.

I think anyone with an AP or tactrix cable could do some basic logs to see if the stuff is better or worse then say shell or chevron 90. I think you guys would want to try logging feed back knock correction under different conditions with the 90 then try the 91 and do the same. Look and see if you see less timing trims being made overall. You would also want to make sure your IAM/DAM is already happy for both tests (1 or 16).

Kinda crude but for those running off the shelf 91 maps the 90 up here seems to be edgy in some areas of the tune however the ECU self tunes a bit with the feed back. Ultimately you would want to see less knock correction and less remembered values in the knock learned tables.

If I get a change I will fill the shop WRX up with some and test in depth.
ill try, my forester is on edge at the moment, on nice dry day im pulling 4-6 degrees of timing because of a small knock occurrence around 3500-4000. TD04 17.5 psi tapers to 16 on 90 chevron gas Cobb AP with altered stage 2 tune. Ill let you know if it goes away.
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Old 08-28-2012, 01:34 AM   #18
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Just did some baseline pulls on Chevron 90, then swapped over to Tesoro 91.
After some initial pulls with a not so true 91 running through the fuel system, it looks promising.
Going to run it for the next week and see if the car still loves it.
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Old 08-28-2012, 01:40 AM   #19
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Quote:
Originally Posted by Nomadgene View Post
If you're going there, talk with them and see if they are able to order even higher octane fuel in their regular quantities. Seems to me that if you can get 91 octane from a source, 92-95 octane shouldn't be too much more of an issue. There is certainly a market for it here. I'd be happy to pay .25-50 cents more per gallon for higher octane.
+1 to this
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Old 08-28-2012, 01:43 AM   #20
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So it is confirmed?!!
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Old 08-28-2012, 02:26 AM   #21
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Picture stolen from Kaitlin.
This almost pisses me off, as I spent the last several weeks getting my tune tweaked for our ****ty fuel.
I still have half a tank, but I'm stage 2 and I have an AP. I know nothing about logging or reading said logs though, so perhaps next week someone can use my setup for testing purposes.
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Old 08-28-2012, 02:31 AM   #22
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Nice, so where exactly is said gas station?
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Old 08-28-2012, 02:39 AM   #23
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Here are the logs that I took with Kyle tonight. These are pulls in 2nd-3rd gear from about 3000rpms to 6000rpms.

Here is before I reset the ECM, with nothing but what was already stored data...




We then went and bought about a gallon of 90 octane from the Chevron on Old Seward and International and reset the ECM, drove it around until the IAM was 1 and did more 2-3 pulls.




The needle barely above E and then we stopped by the Tesoro and put a quarter tank of the 91 in, drove around until the IAM was at 1 and did MORE 2-3 gear pulls.




My interpretation? The 91 seems to have faired well in the somewhat same conditions against the 90 octane - the Feedback Knock Correction isn't as high as the values with the 90 octane, and you do see slightly more timing during higher loads compared with the before logs.

I told Kyle to run the 91 all week and then we will do some more 2-3 pulls to see if the ECM to make sure there is no 90 in the system and to see if the ECM makes anymore adjustments between now and then.
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Old 08-28-2012, 02:45 AM   #24
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Nice, so where exactly is said gas station?
Arctic and International
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Old 08-28-2012, 02:55 AM   #25
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No FBKC shown in those logs?
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