It's less a concern for the ethanol but I don't see a point paying 3 cents more a liter for no benefit. It's only $2 a tank, but two tanks a month and it's enough to buy a chocolate bar :badpokerface:

Yeah I just donated. Dude has a point, a lot of people get useful info out of his dyno for free which isn't exactly fair. I am cool with donating a bit so I can know the answer.

In daily driving it's fine, though I would be a little concerned with long-term storage.

I believe the only reason 91 was somewhat comparable to 94 was because 91 had ethanol in it.

On a whim decided to try a tank of 93 right now. Butt dyno through regular driving has told me zero difference. Not sure if somehow related, but fuel mileage has definitely dropped a bit. Maybe I'm just sub-conciously stepping on it more knowing theres some fancy fuel in there, who knows.

everyone is driving a mgb like me

gotta watch the seals

alright, so i grabbed some logs. this is going to be a longer post but its necessary to help normal people get a sense of whats going on.

to preface: car is a 2017 focus RS, full bolt ons (intake/FMIC/piping/downpipe/exhaust, plugs, coilpacks, BOV etc). vehicle is set up to run a water/meth injection system and usually does so, but for the sake of this testing it was all turned off. vehicle is tuned by Stratified, has always ran well and been reliable, it is *not* a car-killer tune. they know i track the car and i have asked for a tune to not be on the ragged edge just in case.

vehicle has four tune slots: 91, 91+wmi, 94, 94+wmi. all datalogging for building the tunes have been done with chevron. historically my ecoboost vehicles have not liked Shell, but they have also not liked chevron 94. we find chevron 94 to be too inconsistent to base an entire tune off of it, so we usually settle for 91. although when my water/meth is turned on, i run 94 because any variance in fuel quality is ultimately null and void by the added methanol.

i always fill up Chevron 94. so a few weeks ago i went to the Chevron on 5 and bridgeport in richmond, filled up like normal. after filling up though my Cobb Accessport, i cleared all saved values in the ECU including fuel, ignition, timing, boost targets etc so its starting fresh. i drove around like normal (street, highway, some pulls etc) for 300km and then took two datalogs. all runs were done in 3rd gear, 2500rpm to 6500rpm in similar weather and temperatures.

once that tank was empty, i filled up with Shell 93 (46.5L of my 50L tank) from the station on lansdowne and garden city. once again i reset my ECU, i left it on the same tune slot (94 octane, no wmi). in order to be fully fair, i drove around until that entire tank was empty, and filled up once again on Shell 93 so there was absolutely no chev 94 left.

i upload my logs to www.datazap.me which is a great free website for visualizing and interacting with your tunes. it will open the log files and you can click what perimeters you would like displayed. this works best on desktop, if you try on mobile sometimes it wont work properly. i will include some screen caps you can at least view and get a gist of it on your phone.

Chevron 94 run 1 https://datazap.me/u/320icar/chevron...log=0&data=5-9
Chevron 94 run 2 https://datazap.me/u/320icar/chevron...log=0&data=5-9

Shell 93 run 1 https://datazap.me/u/320icar/shell-9...log=0&data=5-9
Shell 93 run 2 https://datazap.me/u/320icar/shell-9...log=0&data=5-9

here is a quick summary of what perimeters you should be looking at, and what they do

actual AFR - this is the direct wideband air fuel ratio reading from the o2 sensor
boost pressure - feel like this one is self explanatory.
ign timing cyl3 degrees - on the ecoboost motor we watch cylinder 3 (we do so because for some reason its the weakest), this is the overall ignition timing of the motor, with 0 degrees being top dead centre. the higher the number, the better. IIRC my tunes peak at about +15 for no wmi
ign corr. cyl degrees - we watch each cylinder separately here. this value ranged from -6 to +4 degrees, and its a live value of what the ECU is adding or pulling per cylinder compared to its target values. again, higher the number the better, negative values is BAD as it means its pulling timing
knock count cyl. # - we watch each cylinder separately again. some knock is ok, modern motors are designed to keep advancing timing until they see knock then pull back. normally on a WMI datalog run i might see 1 or 2 knocks
oct adj ratio lrn - this is a value ranging from -1 to +1 and its sort of an overall score for your octane rating. negative is actually better here. if you saw a value of +1 then it means it has to adjust to the full amount to compensate for bad fuel. -1 means its actually been able to be more aggressive with the tune overall with good fuel
wgdc actual % - wastegate duty cycle, pretty much shows how much my wastegate is actually being used to reach the target boost numbers.
accel pedal pos % - this car is a fly by wire throttle. this shows how far im pushing the gas pedal
etc angle actual degrees - electric throttle control actual degrees. since it is an e-throttle, the computer can adjust the actual throttle body opening to whatever it wants regardless of my pedal input to control boost spikes etc. in this case 82 degrees is WOT, not 100



alright now that the horribly long winded intro is done, allow me to add some screen caps for those on mobile.

Chevron run 1: lots of knocking, lots of negative timing correction and overtall timing was pretty meh

[img]https://live.staticflickr.com/65535/...52701bdd_k.jpgUntitled by 320iCar, on Flickr[/img]

Chevron run 2: lots of knocking, lots of negative timing correction and overtall timing was pretty meh

[img]https://live.staticflickr.com/65535/...bcc06c47_k.jpgUntitled by 320iCar, on Flickr[/img]

Shell 93 run 1: virtually no knocking, ignition corrections all positive, slightly more boost and ignition timing matched what i normally get with WMI

[img]https://live.staticflickr.com/65535/...466ba375_k.jpgUntitled by 320iCar, on Flickr[/img]

Shell 93 run 2: some timing pulled from cylinder 3 (as mentioned a weakspot on ecoboost) but once again overall very healthy, nothing to be worried about

[img]https://live.staticflickr.com/65535/...7376f72e_k.jpgUntitled by 320iCar, on Flickr[/img]


i just want to say that this is a very small sample size, only time will tell. you can look in my datazap files and check out old logs, and i will continue to use shell and start trying to datalog some WMI runs and see how it does. Other than my datalogs, I do watch my live info with the cobb accessport every time I drive, and what I see on a daily basis matches the final thoughts.

at this point, i have no doubt in my mind Shell 93 is the superior fuel to Chevron 94

Let me know if those screen caps are even readable. For some reason when I click them it’s like 144p. I’ve changed the source a few times, seems to keep being blurry

Did your car feel any faster with Shell 93?

No. But my tune is fairly conservative. Even on the WMI tunes you can see my boost tapers off from 26psi to 22 by redline, but only using ~60% wastegate duty cycle. I feel it can handle a more aggressive setup, but I can’t afford to rebuild the motor so it’s fine as is.

I will say I hate my new exhaust, so other than the datalogging I haven’t been driving my car as aggressive lately. So even if she’ll 93 was many times better, I don’t think I’d notice as much

I think I heard you pulling out of the Shell station the other day...

... from my house :)

That loud eh? What's the setup?

3” turbo back with a straight thru muffler. Modern DI motors don’t sound good, and in my opinion the ecoboost motors sound like gArbage, which is why I kept the oem catback for so long. Finally swapped it out cuz I got a good deal on an MBRP but paired with the DP it’s just too much.

The guy crying about fireworks waking up his baby got a 3” turbo back lol

Wow, I know right? It’s almost like puttering through a neighbourhood at idle speed during the day is not comparable to ultra loud booming blasts at 3 am at the park a few houses down ¯\_(ツ)_/¯

Ehh..my neighbour has some sort of exhaust on his titan, guy across the street has a muffler on his Eco boost F150, both are enough to wake me up on start up. I’m sure 3” turbo back is more than enough to be a nuisance. No one just has bothered to tell ya lol

Actually tbh I’m shocked I haven’t gotten a note yet. Thankfully the RS shouldn’t be a daily much longer

Donated to Vancity Audi.

I've been keeping an eye on the average knock while WOT. It's been under -3.00 with Shell which is better than what I was getting with Chevron.

I filled up with 93 Shell (station said up to 10% ethanol) instead of the Chevron 94 I usually get. It made the car feel smoother, including smoother coming off the gas after shifting. With the Chevron, the tip-in is more aggressive so in first gear when you hit the gas it seems to accelerate harder but the throttle got twitchy which made the car jerky to shift sometimes. But that's gone with the Shell, though it now feels "slower", albeit a lot smoother. So...no idea lol

So here is VanCity Audi's latest video on Shell 93:


As Adam was sponsored by Shell to attend the Montreal F1 races, the interview video was very much an enthusiastic plug for Shell, and I don't blame him at all. While there were a number of interesting bits getting covered in the video, the most interesting / useful news I found was the gradual rollout of Shell 93 across the rest of Canada -- Metro Vancouver was actually the first in the country to get this fuel! And now Victoria has it as well, as will a number of other places in Canada. But you can find out for yourself starting at 8:05 in the video.

ive been using shell 93 and i cant tell if there is any difference, if at all, with shell 91. But i sort of drive like an old man 99% of the time

I think for storage though, ill use chevron 94 since i dont want Ethanol in my tank for long durations

When's he gonna refund the community the $10k he collected for a legal fund to fight VI's that's never going to proceed anywhere and he's been holding onto for 2+ years now.

whats up with shell running out of gas. over 4 visits the past 3 days and i couldnt find a single gas station that had gas. This is coquitlamn/port moody/ poco area we are speaking of

That FB page and everything that's attached became an absolute joke about a year ago.

My guess is -- the long weekend meant at least some of the truckers took time off instead of working to do deliveries. This past long weekend seemed esp bad with gas stations running out of regular, after which they get raped by cheapa$$es like me when they start selling their high octane gas at 87 octane price.

Personally, I still don't understand why it is better to sell high octane gas at low octane prices. But hey, since I am benefiting from this from time to time, I am not going to complain.