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Discussion Starter · #1 · (Edited)
From day 1 when I got my car I have been using 94 octane from Chevron. The car is originally from Japan and as I understand they use like 98 and 100 octane at the pump!

I have found myself in many situations that I'm running low on fuel and need to fill up... and there isn't a Chevron on every corner waiting for me with 94.


I am planning to get the car retuned so it can run 91 without any issues also since 91 is largely available compared to 94.


Anyone else use 94 vs 91 and why? I assume this question would be valid for guys on the west coast, not sure which parts of Canada have 94 available.


I had to fill up with 91 one time and the car seemed to run strange also it got really poor fuel mileage compared to 94.
 

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I'm in Ontario and we have sunoco 94 which I've been using until I read some of the negative effects of the ethanol they put in it to raise the octane. I've been using Shell 91 octane with no negative effects lately, but I'm stock except for a slight boost increase.
 

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I'm in Ontario and we have sunoco 94 which I've been using until I read some of the negative effects of the ethanol they put in it to raise the octane. I've been using Shell 91 octane with no negative effects lately, but I'm stock except for a slight boost increase.
The most important point to note from this post is "ethanol." Whether you buy 91 or 94 you want to run fuel that DOES NOT contain ethanol. Out here in BC we can get Chevron 94 and Shell 91 with not ethanol added. I hear the boys in alberta like to run Husky 94, but I don't think it's too popular on the west coast.

I have run both Shell 91 and Chevron 94 without any problems, however I haven't done enough testing to tell you if there is any performance difference between the two.

To the OP's comment about Japan running 98 and 100 octane. Their fuel grading system is different in Japan (as well as in Europe). I believe their grade of 100 ron (actually not octane) is similar to 94 octane in north america without ethanol. If you do a quick search on the net you will find better info.
 

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i want to know the effects of ethanol too, and where you got the info from, been reading all over the net but nothing thats bad yet.
i have hear kindof bad stuff about shell and its nitrogen enriched gas
 

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I live in Alberta, and use Shell 91 consistently. I would never use Husky, due to their mixture of ethanol. I am stock, and have no problem with 91. I would use 94 but we don't have a good source here. 91 it is!!
 

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i love husky94.

among a couple seat of the pants gains i noticed the gas smells alot better decatted, drifting up into my open windows at stoplights.

i hate shell vpower. worst gas known to man in my opinion.

but personally im tuned on american 92 octane and i run only chevron94. so i can drive down to the usa and not worry about detonating.
i know how it sucks to run only 94, but its not that bad if i fill up when it gets anywhere around 1/4 tank.

im still considering getting a re-tune on 87 octane and of course methanol. probably still hit great horsepower numbers and if i save 20 cents per litre and fill up 40 litres once a week i will save over $400 per year on fuel. :idhitit:
i usually go through more gas than that!
 

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I live in Alberta, and use Shell 91 consistently. I would never use Husky, due to their mixture of ethanol. I am stock, and have no problem with 91. I would use 94 but we don't have a good source here. 91 it is!!
Shell is one of the worst gasolines you can use in your car. I wouldn't even fill up my lawn mower with shell gas.

i love husky94.

among a couple seat of the pants gains i noticed the gas smells alot better decatted, drifting up into my open windows at stoplights.

i hate shell vpower. worst gas known to man in my opinion.

but personally im tuned on american 92 octane and i run only chevron94. so i can drive down to the usa and not worry about detonating.
i know how it sucks to run only 94, but its not that bad if i fill up when it gets anywhere around 1/4 tank.

im still considering getting a re-tune on 87 octane and of course methanol. probably still hit great horsepower numbers and if i save 20 cents per litre and fill up 40 litres once a week i will save over $400 per year on fuel. :idhitit:
i usually go through more gas than that!

Exactly. I use 94 husky all summer long. The thing is that you have to be tuned for it. Most people don't tune for the 94 ethanol blended gas and complain the car runs crappier. The only thing that does happen is that your run slightly leaner on 94 ethanol, lower egt and worse gas milage. To me it doesn't matter because its just my summer toy. Plus 94 and 100% meth gets me over that 110 octane level which is a major win for me.

R.K.
 

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Why no Ethanol? Explain your reasoning?
You realize E85 is a mixture of ethanol to gasoline.
I can't remember the exact details. Something to do with ethanol burning at a different temp, so as mentioned by agm if you aren't tuned for it you could go boom....big bada boom.

The info is out there you just have to spend some time searching to find it.
 

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For the minimal amount of ethanol in the 94 its barely going to make a difference on the longevity of your motor or any other "worries" you might have.
If you are on a stock ECU or upgraded the car will do whatever it takes to run correctly and will adjust your timing accordingly.
If you dont have 94 around and need gas put 91 and dont boost...lol
94 FTW
 
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