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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > Canada > 91 Shell or 94 Petro Can for 335i?



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      03-04-2011, 02:01 PM   #23
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started with PetroCan 91, then switched to PetroCan 94. Still on my first HPFP...
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      03-04-2011, 03:34 PM   #24
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Daily use : Shell 91
Sunny days in summer : Petro or Chev 94
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      03-04-2011, 10:13 PM   #25
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Shell V Power for me all the way. Well 90% of the time. No ethanol in the vPower.

Stay away from e85 (15% ethanol) crap, it will void your warranty. The european gaskets and seals can't handle it.
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      03-16-2011, 11:43 PM   #26
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Can someone explain to me why it is better to use the 94 in the summer and the 91 octane in the winter.
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      03-17-2011, 07:49 AM   #27
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Quote:
Originally Posted by BMWCOUPE View Post
Can someone explain to me why it is better to use the 94 in the summer and the 91 octane in the winter.
temps are higher in the summer, higher octane helps to avoid knock. In the winter, temps are lower and generally, 91 octane is acceptable, given that youre less likely to do "spirited" driving anyways. All personal preference really....
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      03-17-2011, 03:41 PM   #28
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Quote:
Originally Posted by turkish335 View Post
temps are higher in the summer, higher octane helps to avoid knock. In the winter, temps are lower and generally, 91 octane is acceptable, given that youre less likely to do "spirited" driving anyways. All personal preference really....
Thanks for the reply Turkish. What is knock exactly and is it something harmful that can effect my engine in both the short term and long term?
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      03-17-2011, 03:59 PM   #29
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Quote:
Originally Posted by BMWCOUPE View Post
Thanks for the reply Turkish. What is knock exactly and is it something harmful that can effect my engine in both the short term and long term?
i wont get into the detailed explanation but in a nutshell, its unwanted detonation of fuel in the combustion chamber and can be caused by a variety of things, including poor gas and high temperatures.

All motors knock under real world conditions and in terms of damage, severe knock can damage your motor instantly while low to moderate levels of knock will have long term impact on your engine. Best to avoid both.
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      03-17-2011, 05:38 PM   #30
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      03-18-2011, 09:11 AM   #31
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Petro Canada for sure!
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      03-18-2011, 10:22 AM   #32
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Quote:
Originally Posted by Dr. G View Post
So I'm back in Canada from the states now and am curious as to what people would recommend for fillups.

There was a thread just a week or so ago and I noticed most people using Shell V-Power 91 octane, but today I was reading a thread about the RB Turbos and noticed that 94 octane Petro gas was being used.

If I was running jb3 Map 3 or 5, would using the 94 octane with the 10% ethanol be better then the 91 octane with no ethanol?
same thing. i use 94 only. V-power doesnt have enthanol but in the states, all gas has 10% ethanol anyways
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      10-26-2012, 09:56 PM   #33
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Here is the answer to your questions

I think No Ethanol should be your best choice,

http://cjandrews.hubpages.com/hub/Pr...Ethanol-in-Gas
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      10-29-2012, 04:06 PM   #34
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      10-30-2012, 09:47 AM   #35
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Quote:
Originally Posted by hubble bubble View Post
Shell V Power for me all the way. Well 90% of the time. No ethanol in the vPower.

Stay away from e85 (15% ethanol) crap, it will void your warranty. The european gaskets and seals can't handle it.
Read your manual. i don't think so.
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      10-30-2012, 09:50 AM   #36
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Quote:
Originally Posted by bulldog x6 View Post
temps are higher in the summer, higher octane helps to avoid knock. In the winter, temps are lower and generally, 91 octane is acceptable, given that youre less likely to do "spirited" driving anyways. All personal preference really....


Exactly.
Quote:
Originally Posted by bulldog x6 View Post
i wont get into the detailed explanation but in a nutshell, its unwanted detonation of fuel in the combustion chamber and can be caused by a variety of things, including poor gas and high temperatures.

All motors knock under real world conditions and in terms of damage, severe knock can damage your motor instantly while low to moderate levels of knock will have long term impact on your engine. Best to avoid both.
Your Engine has knock sensors so there is absolutely nothing to worry about. You can run these things on 89 without any problems other than minor loss of power which is probably undetectable.
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      10-30-2012, 11:04 AM   #37
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Quote:
Originally Posted by 335BBS View Post
[/B]

Exactly.


Your Engine has knock sensors so there is absolutely nothing to worry about. You can run these things on 89 without any problems other than minor loss of power which is probably undetectable.
my comments were geared towards people that are tuned, not stock. Running 89 on a tune is not recommended. Running 89 on a stock car would probably be ok temporarily but its testing the low end of the design limits for the engine, not something I would run on a long term basis (perhaps if you are stuck and only 89 available, or carry some octane booster in trunk in case of emergencies for those that travel to rural environments that are tuned).
Re ethanol comments - rumor is that BMW tests the fuel in the tank to determine the ethanol content and if its above a threshold (10%), they have given people issues with warranty claims and failed HPFP's. Dont have the threads handy but they have been posted on the US side...
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      10-30-2012, 02:25 PM   #38
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Quote:
Originally Posted by bulldog x6 View Post
my comments were geared towards people that are tuned, not stock. Running 89 on a tune is not recommended. Running 89 on a stock car would probably be ok temporarily but its testing the low end of the design limits for the engine, not something I would run on a long term basis (perhaps if you are stuck and only 89 available, or carry some octane booster in trunk in case of emergencies for those that travel to rural environments that are tuned).
Re ethanol comments - rumor is that BMW tests the fuel in the tank to determine the ethanol content and if its above a threshold (10%), they have given people issues with warranty claims and failed HPFP's. Dont have the threads handy but they have been posted on the US side...
Tuned cars have knock sensors too. Running a normal car on 89 has been proven to be fine too. This same thread comes up every month or 2. I believe manual says ethanol in fuel is fine. I don't listen to rumors...especially here. It has been proven that it has nothing to do with HPFP.
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      10-31-2012, 03:47 PM   #39
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Quote:
Originally Posted by prez34 View Post
Does anyone know if the Costco gas has lots of ethanol mixed. Seems like shell is the one o get to keep the ethenol conten down?
Quote:
Originally Posted by bulldog x6 View Post
10% is the max - I heard their gas sourced from Husky
Costco in the west is sourced from Esso.
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      11-01-2012, 08:13 AM   #40
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Quote:
Originally Posted by Vr00mVr00m View Post
I think No Ethanol should be your best choice,

http://cjandrews.hubpages.com/hub/Pr...Ethanol-in-Gas
I wa staking that seriously until they started talking about carbs.......
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      11-01-2012, 10:51 AM   #41
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Quote:
Originally Posted by 335BBS View Post
Tuned cars have knock sensors too. Running a normal car on 89 has been proven to be fine too. This same thread comes up every month or 2. I believe manual says ethanol in fuel is fine. I don't listen to rumors...especially here. It has been proven that it has nothing to do with HPFP.
ok - not sure why this conversation continues to drag on but I beleive you think its somehow a good thing to run low quality fuel in tuned cars or even stock vehicles. So, ill just say that unless it was an emergency, Id stick to the min. octane ratings posted by the manufacturers. If you are tuned and the ignition curve is set to run on high octane gas (like 94), run that gas, not 89, or 87 or whatever. So, if you like to run 89 gas, then buying a 335 was a waste.
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      11-02-2012, 08:15 AM   #42
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91 shell all the way..
airmiles suck though
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      11-02-2012, 11:03 AM   #43
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I use ESSO 91. no issues
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      11-03-2012, 08:43 PM   #44
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Quote:
Originally Posted by bulldog x6 View Post
ok - not sure why this conversation continues to drag on but I beleive you think its somehow a good thing to run low quality fuel in tuned cars or even stock vehicles. So, ill just say that unless it was an emergency, Id stick to the min. octane ratings posted by the manufacturers. If you are tuned and the ignition curve is set to run on high octane gas (like 94), run that gas, not 89, or 87 or whatever. So, if you like to run 89 gas, then buying a 335 was a waste.
There is absolutely zero QUALITY difference between 89 and 94 octane fuel. ZERO. It was proven on CBC Marketplace last night. I agree that If your engine was designed to run on 91 then thats what you should run but if someone chooses to run 89 (not sure why they would) the car will lose a little HP.
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