Petrocanada 94 or shell 91?
 

Hi/salut,

First time i own a car that actually ask for better octane than 91! For what i've seen in my quick web search shell 91 seems to be the favorite even in car that ask for 94 because petro canada 91 is "only" 91 + addidive and also contain ethanol. Shell 91 has no ethanol.

My previous cars asked for 91 and shell was my choice. Now in Montreal region the only 94 i know is petrocanada and i'm pretty its not the ultra94 version that is available in alberta and ontario...

So? Better with a pure 91 (shell) than what seems to be a mixed 94?

Always used Petro 91 on all my turbo cars with no problems. Alot of Subaru Guys swear that shell 91 is best for their cars. I think its personal preference. I have Been using Petro 91 on my 86.

At Petro stations with ultra94, all grades contain up to 10% ethanol, including 94. Shell and Esso 91 contain no ethanol. I would go with 91 over 94 with ethanol.

what about chevron 91

Not an option in Quebec... Or at least not under the Chevron name....

I use 94 since my cars tuned for 94.

I believe the FRS is recommended 93? I would suggest using 94 then. Ethanol just decrease fuel milage, other wise it aint so bad.

And BTW... only those stations with VPower advertised are ethanol free no??

all chevron in BC has 94 enthanol free

I haven't had to fill up my car yet but when I do, should I be scared? I'm sure Chevron 94 isn't cheap. :P

Well they only offer one kind of 91 octane premium(at least in Ontario) and that's their V Power premium which is ethanol free. About the ain't so bad part, isn't ethanol a contributor to fuel system corrosion, hence why people are so against it?

Plus the owners manual does say 93 octane premium required with an * noting that in markets where 93 is not available 91 is fine with no detriment to durability or reliability of the engine, so as far as warranty is considered, using 91 consistently will have no bearing, and you won't be denied because you didn't use 93. Now, I wouldn't gamble with with anything less than 91 myself, but that's just me. Your money, your risk(I'm stating that in the general sense, not at you Heero)

I like Shell 91, my gas milege is a lot better, and higher Than Petro 94, I tend to switch back and forth here and there.

I really wish we had it in Alberta—if we did, it's all I would use. My WRX ran much smoother on it, and it only cost a few more bucks per tank.

Chevron 94, and only Chevron.

I am not usually so brand loyal but I can state, without a doubt, that using chevron gas (87 through to 94) is better than any other fuel. Sure, all fuel comes from the same distributors and carriers - I know this. The techroline additive that Chevron uses is not just a gimmick... it is patented, highly protected, and can only be obtained from a Chevron station.

In a normal car.. say.. something with a 9:1 or 10:1 compression ratio - the difference is not detectable. If you are running a high performance car with a 12:1 compression ratio (as in the FA20) you can feel, hear, and see a difference between other fuels without techroline. I've had a few bikes (crotch rockets, which are extremely high compression and finicky when it comes to fuel) and anytime I filled up with anything other than chevron fuel.. I immediately noticed a performance loss.

Since riding bikes, I have only ever used chevron.. and a few years down the road, when I've had to go to aircare - the proof is in print. I rat bag the ass off my cars and drive them harder than anyone I know... the emissions/particulates scores I get at aircare are sometimes so low, then don't even fall into the average range for the model/year... and the trick has only been.. using chevron, and only chevron.

The shell nitrogen enriched fuels make me laugh... you know the atmosphere is like 80% nitrogen... every fuel is "nitrogen enriched" lol.

I am normally a person that will go for convenience, price, function over anything else... but i've been known to run out of fuel before finding a chevron, because i'm so picky about this...

In Ontario, stick with Shell 91. Over time ethanol destroys plastic and isnt good for the fuel system. The car should get better gas millage and run at its maximum potential. Ultra 94 only comes in handy if you have a turbo vehicle and at that, to get the full potential it must be tuned for it.

Avoid ethanol when storing the vehicle for a while as well!

Well i get the idea for turbo but since brz/frs ask for 93 seemed to me that it was close enough for a real need of 94.... But seems that in QC we have the choice of 94 with ethanol and 91 without.... I guess i'll change from time to time...