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      09-30-2019, 07:23 AM   #23
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We don't get that in BC but Chevron claims their 94 is ethanol free here. In the supercharged e46 I had better luck with Shell 91 but in the f87 the 94 seems fine.
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      07-13-2020, 02:34 PM   #24
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Bringing this thread back, albeit slightly off topic.

Has anyone flashed BM3 stage 2 91 OTS (either ACN or regular) on Canadian Shell 91 V Power? I'm curious if we would benefit more from the ACN map or the regular map. I could also try stage 2 93 OTS with Petro Canada 94, but I've been reading/hearing mixed reviews on timing being pulled.

I've only exclusively put in Shell 91 in my LCI because it was advertised as ethanol-free here. However, I'm not sure I understand two particular points about ethanol-free fuel:
- Is it actually bad for the N55?
- Is ethanol content an indicator of "poor quality" gasoline? i.e., I've been reading about west coast Chevron 94 (which is ethanol-free) vs. other 93/94 gasoline which do have ethanol, and not particular sure which one is technically better, and whether ethanol content is the main/only thing to consider when making this assumption.

edit: I'm aware that in the context of tuning via BM3, I should flash it and analyze datalogs. I'm just trying to decide on my first map (either stage2 91 or stage2 91 ACN), and hopefully when I log it will show no issues and I can avoid having to purchase the full map pack for another $50 USD.
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      07-13-2020, 05:26 PM   #25
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Ethanol gunks up your engine , just that reason alone you should stay away from it .
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      07-22-2020, 01:15 PM   #26
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Ethanol is beneficial on forced induction engines. Avoiding it on these cars makes little sense except for the perceived mileage difference. I only run Shell 91 or Chevron 94 in my R6. The fears around ethanol are based on experiences with older vehicles not designed for it. There's a reason the highest power is made on a E30 to E85 mix.

Anyone living in Ontario should run Ultra 94, it's probably the best gas for these cars in Canada and most people seem to be able to run the 93 OTS maps on it.

Anyone living in the west will struggle to find a decent fuel. Ultra 94 doesn't seem to be formulated the same as the stuff in Ontario. Husky 94 is pretty good, but I was still adding boostane to get clean timing on 91 OTS. Chevron 94 mixed with 15-20% ethanol is what I'm trying right now and it seems good on ACN 91. Planning on changing to the regular 91 OTS and running some logs.

Shell 91 has consistently run the worst in my car, I only used it occasionally to clean out a few tanks worth of E20 mixes with boostane. When I do that I don't drive it hard because its prone to knocking on ACN91.
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      07-22-2020, 03:11 PM   #27
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Ive seen experiments with the shell 91 running the cleanest,

Ie. It leaves the least amount of carbon buildup in your engine

I dont see why this would make different if the engine is forced induction or not, it will still have carbon residue after some time
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      07-22-2020, 04:53 PM   #28
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These cars don't have a problem with carbon build up like N54s. V Power may have the most detergents, but that doesn't mean our cars run better on it. Driving the crap out of your car will have more an impact on carbon build up than the differences in gasoline detergents.

Ethanol has properties that make it better for forced induction, higher octane rating and it burns cooler than gasoline. Turbo cars pump hot air into the engine, the cooling effect helps make more power.
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      07-22-2020, 05:18 PM   #29
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Quote:
Originally Posted by Pray for Mojo View Post
Ethanol is beneficial on forced induction engines. Avoiding it on these cars makes little sense except for the perceived mileage difference. I only run Shell 91 or Chevron 94 in my R6. The fears around ethanol are based on experiences with older vehicles not designed for it. There's a reason the highest power is made on a E30 to E85 mix.

Anyone living in Ontario should run Ultra 94, it's probably the best gas for these cars in Canada and most people seem to be able to run the 93 OTS maps on it.

Anyone living in the west will struggle to find a decent fuel. Ultra 94 doesn't seem to be formulated the same as the stuff in Ontario. Husky 94 is pretty good, but I was still adding boostane to get clean timing on 91 OTS. Chevron 94 mixed with 15-20% ethanol is what I'm trying right now and it seems good on ACN 91. Planning on changing to the regular 91 OTS and running some logs.

Shell 91 has consistently run the worst in my car, I only used it occasionally to clean out a few tanks worth of E20 mixes with boostane. When I do that I don't drive it hard because its prone to knocking on ACN91.
Admittedly I have learned a lot more about this topic ever since I posted my questions, but this post definitely confirms a lot of my new knowledge about ethanol, such as the fuel economy implications. You've also helped clarify that my previous understanding of "Petro94 is bad" is mostly a west coast thing as well. Thank you for this!

I will likely go FBO next spring, and will make sure I'm running Petro94 at least multiple tanks prior to my first log on BM3 Stage 2 93 OTS. If it doesn't look as good as I'd like, I'll bring it down to 91 OTS, and (hopefully not) so on.

Sorry to hear that even the 91 ACN map gives you issues when hammering your car on west coast Shell 91. I will likely go down to Ontario Shell 91 for the winter and experiment with the 91 OTS maps then.
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      07-22-2020, 10:11 PM   #30
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Quote:
Originally Posted by Pray for Mojo View Post
These cars don't have a problem with carbon build up like N54s. V Power may have the most detergents, but that doesn't mean our cars run better on it. Driving the crap out of your car will have more an impact on carbon build up than the differences in gasoline detergents.

Ethanol has properties that make it better for forced induction, higher octane rating and it burns cooler than gasoline. Turbo cars pump hot air into the engine, the cooling effect helps make more power.
So youre saying ultra 94 is the best to use? Better than petro?

Are you just saying or know this for sure?
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      07-22-2020, 11:05 PM   #31
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Quote:
Originally Posted by GoneIn4Secs View Post
So youre saying ultra 94 is the best to use? Better than petro?

Are you just saying or know this for sure?
Petro 94 is better than Shell 91 for sure, especially if your car is tuned. If your car is stock you might not feel much of a difference but the DME does adjust to better octane.
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      07-22-2020, 11:38 PM   #32
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Quote:
Originally Posted by gphung View Post
Quote:
Originally Posted by Pray for Mojo View Post
Ethanol is beneficial on forced induction engines. Avoiding it on these cars makes little sense except for the perceived mileage difference. I only run Shell 91 or Chevron 94 in my R6. The fears around ethanol are based on experiences with older vehicles not designed for it. There's a reason the highest power is made on a E30 to E85 mix.

Anyone living in Ontario should run Ultra 94, it's probably the best gas for these cars in Canada and most people seem to be able to run the 93 OTS maps on it.

Anyone living in the west will struggle to find a decent fuel. Ultra 94 doesn't seem to be formulated the same as the stuff in Ontario. Husky 94 is pretty good, but I was still adding boostane to get clean timing on 91 OTS. Chevron 94 mixed with 15-20% ethanol is what I'm trying right now and it seems good on ACN 91. Planning on changing to the regular 91 OTS and running some logs.

Shell 91 has consistently run the worst in my car, I only used it occasionally to clean out a few tanks worth of E20 mixes with boostane. When I do that I don't drive it hard because its prone to knocking on ACN91.
Admittedly I have learned a lot more about this topic ever since I posted my questions, but this post definitely confirms a lot of my new knowledge about ethanol, such as the fuel economy implications. You've also helped clarify that my previous understanding of "Petro94 is bad" is mostly a west coast thing as well. Thank you for this!

I will likely go FBO next spring, and will make sure I'm running Petro94 at least multiple tanks prior to my first log on BM3 Stage 2 93 OTS. If it doesn't look as good as I'd like, I'll bring it down to 91 OTS, and (hopefully not) so on.

Sorry to hear that even the 91 ACN map gives you issues when hammering your car on west coast Shell 91. I will likely go down to Ontario Shell 91 for the winter and experiment with the 91 OTS maps then.
That's exactly what I'm going to do as well. About to go FBO and then I will decide on whether I should get a tune depending on how it feels since going FBO pretty much makes the car feel like a stage 1 with stock tune and 91 octane
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      07-23-2020, 07:20 PM   #33
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Quote:
Originally Posted by Pray for Mojo View Post
Petro 94 is better than Shell 91 for sure, especially if your car is tuned. If your car is stock you might not feel much of a difference but the DME does adjust to better octane.
Ok i got a tuned dinan stage 4, so ill fill up with petro 94 next time and let you know how it feels
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      07-23-2020, 08:14 PM   #34
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Ya never put ethanol gasoline in your car dude , just do a quick google search on it .

Shell 91 always and forever.
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      07-23-2020, 11:46 PM   #35
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FWIW, a fellow Toronto FBO LCI owner had timing pulled on Stage 2 93 octane OTS running Petro Canada 94. Timing was perfect after going down to 91 octane OTS, same fuel.
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      03-25-2021, 12:40 AM   #36
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I believe on my fuel door it shows “Shell V Power recommended”
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      03-29-2021, 11:42 AM   #37
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I use Petro Canada 94 all day... I flashed down to stage 2 91 octane bm3 OTS map and the car runs perfect and happy. I did have some concern about the stage 2 93 octane map when me and a buddy did some back to back pulls up north I saw the car was not happy happy in terms of timing. HOWEVER THE 93 OCTANE HIT WAS WAYYYYY BETTER AND I MISS IT =(
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      03-29-2021, 01:52 PM   #38
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Quote:
Originally Posted by shazzy View Post
I use Petro Canada 94 all day... I flashed down to stage 2 91 octane bm3 OTS map and the car runs perfect and happy. I did have some concern about the stage 2 93 octane map when me and a buddy did some back to back pulls up north I saw the car was not happy happy in terms of timing. HOWEVER THE 93 OCTANE HIT WAS WAYYYYY BETTER AND I MISS IT =(
How much less HP does the butt dyno estimate?
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      03-29-2021, 05:20 PM   #39
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well it was in the mid range for sure.. id say maybe 40hp/tq ish but thats the butt dyno lol
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      03-30-2021, 01:44 PM   #40
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If you want to run 93 full time just add a few oz of Boostane Pro to the tank when you fill.

Last edited by Pray for Mojo; 03-30-2021 at 03:55 PM..
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