High Octane gas in Calgary?

[swampbuggy]

So I have been running 94 from Husky almost exclusively since I got my Legacy Turbo

but.....

I am starting to wonder if it is even better than 91 at other pumps because of the Ethanol blend that Husky/Mohawk uses.


Anyone know where to get Hi Octane without ethanol?

Aside form additives.

[Annoyingrob]

Originally posted by swampbuggy
I am starting to wonder if it is even better than 91 at other pumps because of the Ethanol blend that Husky/Mohawk uses.


Well, simply put, yes, it is better. I ping on 91, but don't on 94 :)

Not sure if there's anything higher though. There may be some 100 by the race track, but I'm just guessing.

[modded46]

you can get over 100 "low lead" at SpringBank Airport and I wouldn't run the time.. Other than that Husky 94 is the highest you'll find at the pump..

Side note..

Centex which has kick ass gas prices on 16th Ave across from Chili's, Sears, etc.. can't remember the name of the mall.. Has 92 Octane and usually only a few cents more than regular gas.. Last time I was there I paid 94.9 or something for premium. not bad at all.

[swampbuggy]

Okay, sweet North Hill Mall is really close to me, I might try their 92 and see if I feel it is any different.

I like Husky since it's Canadian but I am not sure how I should feel about ethanol blended gas....... maybe it's just as good which then is even better since apparently it's easier on the environment?

[Sorath]

i knock more on husky 94 than on shell 91

try shell

[962 kid]

Originally posted by Sorath
i knock more on husky 94 than on shell 91

try shell

husky 94 > anything else in the city

[Sorath]

shell burns cleaner....

[swampbuggy]

Is Shell 91 that much better than Petro Can 91? It was Petro 91 that I was running that made me question my choice..... I ran really smooth on it

[962 kid]

Originally posted by Sorath
shell burns cleaner....

who cares?

Here, I managed to dig this up:


Originally posted by Rage2, way back in the day

Quite a bit... the fuel curve is mapped to 12.2:1 A/F ratio at 7psi all the way to 28psi (set any boost pressure and it'll be the same A/F ratio, however ethanol blends will "lean" out the readings a little bit). Timing is set about 7psi to 20 degrees total timing. There's also a knock sensor which retards timing when knock is determined (the octane determines at which psi it starts to knock). So, my car is a rolling octane tester.

Petro Canada has the worse gas (11psi), Shell and Esso are a bit better (12psi), Mohawk 92 is the best (13psi), and Mohawk 94 was just tested with excellent results (15psi). At about 10whp per psi of boost, it's well worth shopping around for the best gas.

On my SLK, the ECU is set to expect 93 octane fuel. Because it's an OBD2 car, I can read timing advance very easily using an OBDII scanner. Here are the results on similar weather days (except for 94, which was done today at 28C). The higher the number, the cooler the engine runs (lower EGTs), the more power it makes, and the longer your valves last . Results mimic the Porsche boost test. Runs were done in 3rd gear.

VP MS103 - 21-23 degrees
Mohawk + VPMS103 (~93.5) - 17-20 degrees
Mohawk 92 - 16-17 degrees
Esso 92 - 14-16 degrees (After government tests, it's been renamed to 91)
Shell 91 - 13-15 degrees
Petro Canada 91 - 11-13 degrees
Mohawk 94 - 19-22 degrees on a hot day!

If your car is stock, you probably won't see a difference in the different "premium" brands

[swampbuggy]

That's funny. I guess maybe I shouldn't rust my instincts since Petro was the worst and I liked it.:dunno:

[SilverBoost]

I used to use petro-can exclusively and then my fuel filter convinced me to switch.

I tried using Mohawk all one summer, and I seemed to get some pretty shitty mileage on that 94 blend, not to mention my car actually ran worse than it did on 92.

I've run shell ever since for the past few years and it seems to run fine and seems to keep my expected mileage where it should be on average.

Scientific date = zero
gut feeling = 100%

[R!zz0]

I still don't know where i can get a 94 octane fuel in the N.E. :(

[aln]

Originally posted by R!zz0
I still don't know where i can get a 94 octane fuel in the N.E. :(

i think the closest place is on 16th ave and edmonton trail? its a mohawk gas station


question:
so you guys think the 91/92 octane at shell is better than the 94 octane at mohawk/husky? my car recommends 93 octane. would it be okay running the fuel at shell or stick with the 94 at mohawk?

[rage2]

Originally posted by SilverBoost
I tried using Mohawk all one summer, and I seemed to get some pretty shitty mileage on that 94 blend, not to mention my car actually ran worse than it did on 92.
Ethanol blends while great at reducing knock, introduces 2 problems. It messes with your AFR at WOT (unless your car has a WBO2 sensor that can adjust for it), and because it carries less energy than straight gas, you will get worse fuel economy. Because it messes with AFR, even at part throttle and idle it takes some cars a bit of time to adjust (if at all) which is why you're seeing the car run worse.

You should see the cars that are flex fuel, when using E85 (85% ethanol and something like 105 octane) mileage drops about 40% haha. But it can make some serious power, lots of guys are converting track cars to E85 in the states using standalones.

[Supa Dexta]

Any more advice rage? I plan on running meth as well, I have a wideband and dsmlink. And this will just be a play car to tool around with. Few trips to the track and back and forth to calgary/edm a few times likely. I know e85 is getting bigger all the time down there, and is used a lot more then on track cars.

And FYI husky is no longer canadian, it's chinese. Or so I've heard, from people in the know.. or think they know anyways..

I found this in a quick search and only skimmed thru it, (It's not the topic I'm investigating right now):

http://www.orwelltoday.com/chinahuskyoil.shtml

this will give leaded gas a whole new meaning

[camarooon]

i dont really understand why you guys have to run 91 octane or better unless your running a high compression or an extremely done up forced induction engine.
do any of you even know the definition of octane?

[4wheeldrift]

You're SOL for getting 94 octane from anywhere other than Husky at the moment. When I got the Mazdaspeed 6 that was the first thing I checked. If we were in toronto, montreal or vancouver we'd be able to get 94 from the pump from most stations. Tragically however we're not.

[Supa Dexta]

Originally posted by camarooon
i dont really understand why you guys have to run 91 octane or better unless your running a high compression or an extremely done up forced induction engine.
do any of you even know the definition of octane?

...yes and yes.

[B20EF]

I always thought Esso was one of the worst, it's surprising to see it passed Shell.

I'm still confused though because if the ethanol leans out at the top of the range then I guess FI should be using Esso premium, right?

[Supa Dexta]

Where did you see that.. Shell had issues a while back and got exposed, but turned everything around to be one of the best I thought I read recently. Possibly the same time they came out with the top tier.. .:dunno:

[Toma]

Like Rage said... Mohawk.Husky 94 easily typically allows 2 psi more boost over anything else.

As for mileage..... I can't see how it would change. AT WORST, you might see a 3.5% drop.... but that's not likely since its more volatile and you get better, more complete burn........

The way I see it.... you either have a car that just need premium, in which case, use whatever is cheapest. If its hot rodded and tuned to the max, then you have only one choice, the 94....

For the Original poster.... if its a newer factory Legacy GT.... it doesn't matter what premium you run.

[Toma]

Originally posted by 4wheeldrift
You're SOL for getting 94 octane from anywhere other than Husky at the moment. When I got the Mazdaspeed 6 that was the first thing I checked. If we were in toronto, montreal or vancouver we'd be able to get 94 from the pump from most stations. Tragically however we're not.
Yeah, but Toronto, Vancouver and Montreal are all very close to sea level.... so there you NEED 94, which to your motor is the same as 91-92 here.

There is method to the oil companies madness.

[thinmyster]

toluene and xylene (paint thinner) are great and have been used for years. I use toluene and no ill effects. On 11 gallons or so I add 1-2 gallons of toluene (. Toluene is 114 octane and xylene is 117 octane but also $5 more. Usually toluene runs about $10 and xylene runs $15. Not sure I get it at cost. Just DO NOT use them as a race gas obviously. With my formula it bumps me up to about 96 octane for less than $40 for a full tank.

You can find them at most hardware stores and you can't get anything larger than gallon quantities. At least not here.

[bspot]

Originally posted by camarooon
i dont really understand why you guys have to run 91 octane or better unless your running a high compression or an extremely done up forced induction engine.
do any of you even know the definition of octane?

Well when you have a tune for 91 octane and a tune for 93 octane....

[rage2]

Originally posted by camarooon
i dont really understand why you guys have to run 91 octane or better unless your running a high compression or an extremely done up forced induction engine.
do any of you even know the definition of octane?
Out of curiousity, do you consider a manual boost controller on a turbo car to be "an extremely done up forced induction engine"?

[B20EF]

Originally posted by Supa Dexta
Where did you see that.. Shell had issues a while back and got exposed, but turned everything around to be one of the best I thought I read recently. Possibly the same time they came out with the top tier.. .:dunno:

If you were talking to me it shows in Rage's post years ago that Esso burned at a higher degree than Shell, which I guess made it better

Regardless I still use Shell

[n1zm0]

^+ 1 for shell, all i've ever used

[98brg2d]

My observations:

94 gets about 25MPG city vs 30MPG city for 92 (both Husky obviously) when I drive easy and don't hit boost alot (ie winter driving).

When summer driving and hitting boost alot mileage is about the same in the city (~22 MPG) but less timing is being pulled using the 94 so it makes more power and is safer.

This is on a DOHC neon with 9.5:1 compression and a TD05 hybrid S20G but pretty low boost (7 psi)