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-   -   Dyno testing fuels - Big difference between Shell 91 and Chevron 94 (https://www.revscene.net/forums/717143-dyno-testing-fuels-big-difference-between-shell-91-chevron-94-a.html)

cdizzle_996 09-29-2021 01:44 PM

Shell 93 is at the MT. Lehman + Fraser HWY station in Abby

BABU 09-29-2021 04:09 PM

Getting E5 from Shell on Oak and King Edwardhttps://i.ibb.co/zQ62W73/9-F6-B61-D2...9-AC21-AE6.png

EvoFire 09-30-2021 08:17 AM

You car can detect the e content of the fuel?

320icar 09-30-2021 09:17 AM

Quote:

Originally Posted by EvoFire (Post 9040905)
You car can detect the e content of the fuel?

A lot of people who run e85 get ethanol content sensors. Simple in-line sensor

keifun 09-30-2021 02:13 PM

For people in East Van, the Shell on E.hastings/Victoria Dr. Has 93 octane now. They got rid of 89. Just 87/91/93 now.

beansbaxter 09-30-2021 02:23 PM

So does 91 now contain up to 10% ethanol?

Photo credit: AzNightmare
https://i.imgur.com/Mxb3PcO.jpeg

EvoFire 09-30-2021 02:30 PM

I thought Shell 91 always contained up to 10% e, it was Chevron 94 that had no e

Manic! 09-30-2021 02:51 PM

So they got rid of 89/midgrade. 91 would be a mix of 94 and 87.

beansbaxter 09-30-2021 02:54 PM

Quote:

Originally Posted by EvoFire (Post 9040947)
I thought Shell 91 always contained up to 10% e, it was Chevron 94 that had no e

It was confirmed 0% ethanol in the second video (1:25 - 1:40) of the OP.

mr00jimbo 09-30-2021 03:38 PM

So is this a big thing for Shell now, move from 91 to 93?

dorian 09-30-2021 03:48 PM

so i just tanked up with 50L of shell 93 and did some logging versus my usual 94 chev fuel that i use. Exactly the same timing pulls across cylinders in the same gear with the same IATs. Ill do some more testing in the upcoming weeks to see if there is any kind of difference once the gas stations cycle through a few tanks of 93. So far, no difference

JL9000 09-30-2021 07:20 PM

Quote:

Originally Posted by 320icar (Post 9040913)
A lot of people who run e85 get ethanol content sensors. Simple in-line sensor

Are these sensors ethanol specific?

I ask because I often check fuel alcohol content as part of my driveability diagnosis, and Shell 91 always had closer to 10% in my experience despite supposedly containing no ethanol. Chevron 94, on the other hand, usually had less than 5%.

Manic! 09-30-2021 11:30 PM

Quote:

Originally Posted by beansbaxter (Post 9040950)
It was confirmed 0% ethanol in the second video (1:25 - 1:40) of the OP.

Can't be anymore if they did not install new tanks. 91 has to be a mix of 94 and 87.

AzNightmare 10-01-2021 04:08 PM

Quote:

Originally Posted by dorian (Post 9040956)
so i just tanked up with 50L of shell 93 and did some logging versus my usual 94 chev fuel that i use. Exactly the same timing pulls across cylinders in the same gear with the same IATs. Ill do some more testing in the upcoming weeks to see if there is any kind of difference once the gas stations cycle through a few tanks of 93. So far, no difference

What car are you testing with?
Are you also doing any tuning or just switching fuel and doing the logging?

If this fuel is legit, tuners should be able to make decent power gains. But I assume a tune will be required to really notice big gains?

320icar 10-01-2021 07:16 PM

Quote:

Originally Posted by AzNightmare (Post 9041103)
What car are you testing with?
Are you also doing any tuning or just switching fuel and doing the logging?

If this fuel is legit, tuners should be able to make decent power gains. But I assume a tune will be required to really notice big gains?

He has the FBO tuned 335i

You are correct that you’d need a pro tune to really grasp the change. But if I loaded my chev 94 tune (not wmi) into my FBO focus RS I know my timing curve, normal knocks on load, my ignition and octane adjust ratios. Should be pretty clear on datalogging whether it’s way worse, way better, or for all intents and purposes the same

dorian 10-01-2021 07:20 PM

Quote:

Originally Posted by AzNightmare (Post 9041103)
What car are you testing with?
Are you also doing any tuning or just switching fuel and doing the logging?

If this fuel is legit, tuners should be able to make decent power gains. But I assume a tune will be required to really notice big gains?

2010 bmw 535xi Stage 1+ 93oct Tune @ 16 psi

This tune always has timing pulls across all cylinders but sometimes i splash 10 L of E85 and it quickly brings back all the cylinders to zero within 10 mins of driving.

This log was 50L of 93 and i drove for about an hour before logging.
the results were IDENTICAL.

Lets give it a few more weeks and ill log again and see if there is less timing pulled.

forcedot 10-02-2021 04:10 PM

This guy isn't re-inventing the wheel here. More octane is better when you consider 94 vs 91. Yes ethanol has its benefits for performance but not at only 10%.

So the 93 with 5-10% ethanol, vs 94 no ethanol should be extremely close, you'd not know the difference with the margin of error.

EvoFire 10-03-2021 10:09 AM

Quote:

Originally Posted by dorian (Post 9040956)
so i just tanked up with 50L of shell 93 and did some logging versus my usual 94 chev fuel that i use. Exactly the same timing pulls across cylinders in the same gear with the same IATs. Ill do some more testing in the upcoming weeks to see if there is any kind of difference once the gas stations cycle through a few tanks of 93. So far, no difference

I'm just going with my butt dyno, when I filled my M3 with the 93 with ~1/4 tank Shell 91 left in it, the car felt better and the hesitation was one.

I am at 1/2 tank left right now and it feels like some of the hesitation is back. I plan on giving it another tank or 2 to completely flush out the old 91 and see if it's anything.

I hope it's not a placebo or just some perfect running conditions. I don't plan on tuning the car ever (its got enough power) but running perfect vs the car hesitating on a stock tune is still worth the premium imo.

hud 91gt 10-03-2021 11:55 AM

You guys have some calibrated butts. I add 5psi to my car and I call it almost unoticeable despite being 70hp. Lol. Maybe because it’s so loud my senses are saturated. Lol.

68style 10-03-2021 01:45 PM

Bunch of sensitive asses on RS is basically what you're saying

320icar 10-03-2021 02:02 PM

Quote:

Originally Posted by hud 91gt (Post 9041199)
You guys have some calibrated butts. I add 5psi to my car and I call it almost unoticeable despite being 70hp. Lol. Maybe because it’s so loud my senses are saturated. Lol.

Well, in my case I’m looking at datalogging, not butt dyno. But also since I drive the same car every day you tend to notice even small changes

EvoFire 10-03-2021 09:20 PM

Quote:

Originally Posted by hud 91gt (Post 9041199)
You guys have some calibrated butts. I add 5psi to my car and I call it almost unoticeable despite being 70hp. Lol. Maybe because it’s so loud my senses are saturated. Lol.

When the car pulls timing the bogging that happens is very obvious.

Car is heat sensitive and fuel sensitive even just stock tune.

yray 10-12-2021 05:03 PM

shell 93 now at marine and boundary

Traum 10-12-2021 05:06 PM

Was in Mission yesterday, and both Shell stations there are still running the 87 / 89 / 91 combo. I filled the tank with their 91 gas anyway, but I didn't particularly notice any discernable difference from the mundane driving that I was doing.

yray 10-12-2021 05:36 PM

Quote:

Originally Posted by Traum (Post 9041923)
Was in Mission yesterday, and both Shell stations there are still running the 87 / 89 / 91 combo. I filled the tank with their 91 gas anyway, but I didn't particularly notice any discernable difference from the mundane driving that I was doing.

I had mixed bag from different shell stations. Noticed newer stations seem to have better fuels.


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