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Old 04-19-2016, 12:02 PM   #1
Mikeshoie
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Cobb and Canadian gas

To any fellow Canadians running the access port, what type of gas are you using? I've had some slight timing pull using the stage 1 91oct high boost while running 94 oct (petrocan). Is a -3 degrees pull worth switching back to the low boost tune?

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Old 04-19-2016, 12:18 PM   #2
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Very good question !

I had the impression that Canadian 94 oct was better than the US 93. Am I wrong ?
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Old 04-19-2016, 12:34 PM   #3
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Originally Posted by Mikeshoie View Post
To any fellow Canadians running the access port, what type of gas are you using? I've had some slight timing pull using the stage 1 91oct high boost while running 94 oct (petrocan). Is a -3 degrees pull worth switching back to the low boost tune?

Thanks
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Very good question !

I had the impression that Canadian 94 oct was better than the US 93. Am I wrong ?
is the 94 octane from that place Ethanol free? I have see people post about Chevron 94 being ethanol free up there in Canada land. Sounds wrong but try Shell 91 or another good 91 octane.

Ive seen reports of the 94 there being subpar honestly.
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Old 04-19-2016, 12:36 PM   #4
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Im under the impression by a article i just read.. http://www.theglobeandmail.com/globe...ticle13224927/

That your guys gas fluctuates a lot... where as in America ours is much more constant values.

Not all gas companies have the same quality control/testing done to ensure that its the same across the board.

I would use a top tier company such as shell etc for your fuel and you would know your getting the best gas.

I for one only use Shell or Sunnoco gas and never had a issue gas related. Cheap/bad gas can be a issue anywhere so i try to stick to the name brand higher tier gas companies. Not all 93oct is the same.
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Old 04-19-2016, 12:42 PM   #5
Mikeshoie
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Yes our 94 is ethanol free. I'll have to burn though this tank and take some logs with Shell V-Power
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Old 04-19-2016, 01:32 PM   #6
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I've heard this but don't know the reason behind it. I've heard shell is better than Cheveron, but only through word of mouth, not with any actual data.

I feel like the quality of the top tiers should be the same, but may fluctuate more with the lower octane fuels...but I also have no idea what I'm talking about
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Old 04-19-2016, 02:03 PM   #7
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yeah...not sure about US but our Gas phuckers give us this so called winter gas and then summer gas. More or less detergent and additives I'm guessing for the winter.

I don't have anything to test the octane rating for Costco, Shell or PetroCan gas. I've been using Costco gas as I've not "felt" the difference when i've used Shell for two fill ups or Petro or Costco... .maybe a sincere analysis is required.
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Old 04-19-2016, 02:17 PM   #8
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for what its worth. All be it this list has expanded quite a lot since i first saw it.
*Edit nevvermind this wasnt the original list i was talking about before.. i cant find the original list which was made by BMW talking about gas and what companies were approved M' cars gas companies. (Granted that list was posted when the E46 M3 was brand new...)

http://www.toptiergas.com/retailers/


Here is this from 2015.
http://www.shell.us/motorist/shell-f...-gasoline.html
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Old 04-19-2016, 02:46 PM   #9
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Turns out our V-Power gas is also ethanol free as well. I might have to get an Etune specific to our lower rated gas or stick to the 91 low boost OTS tune. Also, can anyone chime in on a -3 degree pull? Bad, not that bad?
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Old 04-19-2016, 03:13 PM   #10
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Petro Canada 94 octane is some of the best pump fuel in North America, hands down.
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Old 04-19-2016, 03:19 PM   #11
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Turns out our V-Power gas is also ethanol free as well. I might have to get an Etune specific to our lower rated gas or stick to the 91 low boost OTS tune. Also, can anyone chime in on a -3 degree pull? Bad, not that bad?
Here is some info i could find quickly about timing. (Its a bitch to understand)

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Originally Posted by Chris@DoubleApex View Post
Timing at idle is around -4 deg to -6 deg BTDC.


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Originally Posted by 2013R View Post
what makes the most sense, is the p3 gauge positive number is pulling as you said. you want the lowest numbers possible. when it says negative numbers, thats advancing timing giving you more power. at least thats the direction it would make the most sense in.
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just like god intended. he didnt kill off the dinosaurs for their sweet sweet bone juice to have it go getting wasted by eco-obsessed torque thieves.
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Old 04-19-2016, 03:20 PM   #12
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So from my basic reading skills it would appear that (-) timing is adding power and (+) timing is retardation taking power away. I dunno if its right that what i read off that one thread.. maybe someone else with better knowledge can chime in.
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just like god intended. he didnt kill off the dinosaurs for their sweet sweet bone juice to have it go getting wasted by eco-obsessed torque thieves.
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Old 04-19-2016, 04:16 PM   #13
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Quote:
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Turns out our V-Power gas is also ethanol free as well. I might have to get an Etune specific to our lower rated gas or stick to the 91 low boost OTS tune. Also, can anyone chime in on a -3 degree pull? Bad, not that bad?
which tune OTS are you running? did you take a full log of the last pull you did on the Shell 91?
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Here is some info i could find quickly about timing. (Its a bitch to understand)
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So from my basic reading skills it would appear that (-) timing is adding power and (+) timing is retardation taking power away. I dunno if its right that what i read off that one thread.. maybe someone else with better knowledge can chime in.
knock retard values of negative means the ECU is pulling timing (retarding timing) to cure or extinguish the registered knock event

so if your seeing timing correction in the negative. the car is having timing pulled. not advanced.

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Old 04-19-2016, 04:37 PM   #14
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which tune OTS are you running? did you take a full log of the last pull you did on the Shell 91?



knock retard values of negative means the ECU is pulling timing (retarding timing) to cure or extinguish the registered knock event

so if your seeing timing correction in the negative. the car is having timing pulled. not advanced.

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Ahh the thread i read worded it opposite its so confusing.
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