which is better to use Shell 91 or PetroCanada 94?
 

I'm debating if i should use Shell 91 with no ethanol or PetroCanada 94 with 10% ethanol? Toronto can be quit cold in the winter and quit hot in the summer, and I don't want to switch back and forth with different octane.

My car mech buddy recommended Chevron 94.
and he said the 91 from Shell will kill your engine faster
Please correct me if I am wrong.

Also I am here to see what fellow members suggest

While I'm not in your climate zone I've used 91 exclusively and have had absolutely no problems in 5,000 miles.

I"ve been exclusively using 94. As soon as I went to one tank of Esso 91, it was a reduction in pick-up. I have yet to try an E0 91 shell. I'm curious too.

I have been using mostly shell 91 but i did use 1 tank of petro 94 a while back. really didnt notice a difference at the time but ill have to try it again.
shell is just closer to home for me.

I bounce back and forth between the Shell and Petro Canada. It doesn't seem to make much difference in the cold weather. When it is warm (or Hot) out, the car seems to like the 94 a little better, but I get crickets. No crickets with the Shell 91 (0% ethanol) warm or cold.

Shell 91 since birth. No ethanol, no problems, no crickets, easy to find.

are there any differences between shell V-power 91 and shell 91?
i used those mixed pumps(you can select 87 89 91) to add 91, and then i saw a single pump supplies only 91(with V-power sticker)

V Power in Canada is ethanol free.

For performance, Petro 94 is best but you get crickets.

I have also used V Power 91 and don't detect any major difference.

No Chevron 94 ethanol free in Ontario.

It's all good so long as you're 91 octane or above. Winter time isn't really when you want to max out power, so mileage should probably determine your best choice.

im getting 91 at Petro canada

Try 91 V-power Shell (if Quebec also has no ethanol) for slightly better gas milage, or Petro Canada 94 for slightly improved running/power. You may not notice a difference this time of year, but in the summer you likely would. JMO.

All the Shell Canada 91 is V-Power.

The 3 product pumps are blender pumps that draw from a V-power(91) and a regular(87) underground tank mixing to generate 89. The V-power only pump will be connected to the V-power(91) tank only.

i put petro 91 once and it had way more mileage than V power 91. will try another tank of v power 91 tmr to confirm it.

keep us updated

Shell 91> Ultra 94

Exact same here, no issues with Shell 91.

Shell V-Power 91 all the way. Anything with ethanol is cricket inducing.

I've tried shell 91 a few times but always came back to 94 despite the crickets. I like the bump in power.

How much more expensive is the Ultra 94 over the V-Power 91?

Probably a few bucks..

$3-5 per tank.

In terms of the quality of the gas the Shell V Power 91 (ethanol free) is better than the Petro Canada 94.

They will both be fine for the car.

The best is Chevron 94 (ethanol free) but it's only available out west (vancouver)

Has anyone actually dynoed it to see if they get more power on petro 94 over shell 91 on the stock ECU?

I know I bet slightly better mileage on shell 91 than petro 91 or 94, but don't feel a difference in power. Since ethanol makes less power per given volume and higher octane burns slower, I'd be shocked if the stock tune makes more power on petro 94 over shell 91.

Yes, you'll lose power if you run too low of octane, but if it's not knocking you don't generally gain any power going to a higher octane without adjusting the tune to take advantage of it.

As for difference in cost, it's about 3-5 cents more for 94 over 91 which is about $2 / tank max.

Only use shell 91. Crappy gas mileage though 450 kms/tank on a good day.

I've used Shell V 91 almost exclusively. No crickets. Gas mileage is good in my opinion. I've put in $5 of Petro 91 once, as I ran out and was in a rush, didn't hear the crickets or notice any decrease in perf or mileage, but topped up with Shell shortly after. I'll keep using Shell, as its close to work for me, so I'm good.

I think the best way is so switch.

Use V-91 for a week or a month,

Switch to 94 for a week or a month after, and switch back and see.

Everyone has their own pref.

I personally only use shell now + AirMiles.

I don't know how you guys can compare gas used VS mileage...I use petro 91 all the time and my mileage varies like crazy..Too many factors to even remotely answer in a scientific way lol.

i chose shell soley for the reason that it doesn't put an army of crickets under the hood.

I used Shell, and Petro, and now Costco.

Don't notice a difference per tank. Milage was all roughly the same.

for the past day week and a half, ever since I got my car. I've drive 1000kms, i've been using Petro 91 since the first ime i pumped. I think im getting near 600kms from almost a tank of gas. I'm thinking of switching to Shell 91v-power after my current tank and see how it goes. I've been reading that ethanol within gasoline lowers milage but helps keep it cleaner. While vice verse non ethanol gas provides better milage but not as clean? Is this true or a myth? I personally wanna switch to Shell cuz I wanna save gas money, with MBNA smart cash and air miles, it should save me a lot more money than staying with petro n it's crummy points system imo...

I have been using Shell 91v-power since day one until that very convenient gas station closed down and have since used Chevron 94 (no Ethanol) for about 4 tank fills.

I have noticed a slight power gain, but that is probably partly to do with the colder weather this time of year. My mileage is about the same with mostly rural and some city driving.

V-power is a highly additivized fuel with probably some of the best cleanliness additives on the market. The way these additives are added to the fuel may also contribute to improved lubricity contributing to fewer observations of crickets.

Yes we did dynoed it up here in quebec and the result were 5whp more with 94oct. and for the cricket I get it with both gaz so I use Petro Canada

Thanks for confirming what my butt dyno felt. I don't notice much difference in the cold weather, but in the middle of summer I do. When it is hot out, I find that a quick blip of the throttle in preparation for a downshift to pass someone, I get 1 sharp snap of ping (presumably the computer then pulls some timing). This is pretty consistant with the 91. With 94, it rarely happens. I don't have much faith in "octane-in-a-bottle" additives, but I have found one that works. When I'm running 91 plus a bottle of this stuff, that ping that I hear on a throttle blip is not there... http://www.lucasoil.com/products/dis...show&headTitle= - Lucas Octane Booster. I think it was a MazdaSpeed forum where I first read about this stuff, and it is one of only 2 or 3 octane boosters that actually seem to do anything other than lighten your wallet. This stuff is about $12 a bottle and upgrading to 94 from 91 is only about $2 a tank (4 cents/litre X 50 litres).
Straight 94 gives me crickets...I've tried the 2-stroke trick, and it works.

For those of you getting 400 - 600+ kms per tank ... how much of it is Highway, and is your car MT or AT?

For some reason I'm only getting 320-380 kms per tank. (filling up as soon as the light goes on, on the higher end)

I drive ALL city, mostly traffic, and lots of stop lights. Could have an effect?

:iono:

this should be obvious, but you get better fuel economy on the highway.

stop and go, red light to red light will give you the worst possible fuel economy.

duh :bonk:

I'm about 75% 2 lane rural roads/highways and 25% city driving. Car is MT and I usually get 400+ KMs to about 3/4 of a tank per week.

I use Shell 91, MT, 550 per tank (90% highway)

I just put a near full tank of vpower 91. I feel a significant difference from putting 91 at petro. The shifting is less jerky, i might be a lil bias bc i've been using petro for so long that something new might unintentionally feel btr. Though i do feel a btr push and flow during acceleration. Petro 91 for me seemed very "airy"? Im gonna try 94 for my next tank and see wut happens from there.

let us know after u try 94 for a couple of tanks