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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 05-31-2013, 11:53 AM
AbKosBMW11 AbKosBMW11 is offline
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Fuel Grade?

Hello everyone! I'm a new & first time BMW owner. 2011 BMW 328i xDrive to be exact. I understand from the owner's manual that any Fuel with 89+ Octane rating would be sufficient. What are you BMW owner thoughts? Any long term engine effects?
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  #2  
Old 05-31-2013, 11:55 AM
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BiHoTTo115 BiHoTTo115 is offline
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Put the best fuel in it, at all times. No reason to skimp on something that your car actually REALLY needs to function properly.
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Old 05-31-2013, 11:55 AM
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  #4  
Old 05-31-2013, 11:59 AM
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BiHoTTo115 BiHoTTo115 is offline
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I mean that's really it. The other side of it is you can run sh*tty fuel and it'll chug (see next set of parentheses) and the MPG will be affected (how bad, depends on who you talk to, and what time of day it is, if they had their lunch, if the sun was out, etc.). Why am I even bothering...sigh.
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  #5  
Old 05-31-2013, 12:05 PM
AbKosBMW11 AbKosBMW11 is offline
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I understand what you're saying. But why pay for more when its not going to enhance your car performance or effect your engine life over the long term?
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  #6  
Old 05-31-2013, 12:15 PM
Michael Schott Michael Schott is offline
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Before this gets out of hand, this question has come up literally hundreds of times here. Search will yield a bunch of crazed threads.

The bottom line is that BMW recommends AKI 91 octane for best performance for the 328. You can use lower octane but if the engine senses detonation it will retard the timing resulting in a slight loss of power and fuel economy. Depending on what state you live in, 91 octane may be hard to find. You can use 93 but as the engine is designed to be optimal on 91, it will not make any more HP than if you used 91 octane. I filled up a few hours ago with 93 octane as the station did not have 91.

There should be no long term effects from using any grade of fuel but there is no reason to use anything less than 91 as the cost savings over the long term is minimal. Even at 20 cents/gallon if you drive 15,000 miles/year and average 22 mpg that's about $136.00 annually on a $40K car.
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  #7  
Old 05-31-2013, 12:16 PM
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floydarogers floydarogers is offline
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Originally Posted by AbKosBMW11 View Post
I understand what you're saying. But why pay for more when its not going to enhance your car performance or effect your engine life over the long term?
It WILL enhance performance. You get the most power and mileage when using premium. In most cases, the increased mileage pays for the extra $.20/gallon.

One might not notice the fact that you only have 225 hp to play with rather than 235, as the extra 10 hp from premium gas only shows up close to the 7,000 redline, however.
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Old 05-31-2013, 12:20 PM
Tom K. Tom K. is offline
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While I would agree, the price differential in my area has recently been $.40/gal., not $.20. At those prices, it seems more cost effective to run 87 octane in my 328i.

Tom
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  #9  
Old 05-31-2013, 12:21 PM
#propaganda #propaganda is offline
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Fuel Grade?

Wait? I can put 91 instead of 93 on my 335????


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  #10  
Old 05-31-2013, 12:27 PM
Alpine300ZHP Alpine300ZHP is online now
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Fuel Grade?

Quote:
Originally Posted by Michael Schott View Post
Before this gets out of hand, this question has come up literally hundreds of times here. Search will yield a bunch of crazed threads.

The bottom line is that BMW recommends AKI 91 octane for best performance for the 328. You can use lower octane but if the engine senses detonation it will retard the timing resulting in a slight loss of power and fuel economy. Depending on what state you live in, 91 octane may be hard to find. You can use 93 but as the engine is designed to be optimal on 91, it will not make any more HP than if you used 91 octane. I filled up a few hours ago with 93 octane as the station did not have 91.

There should be no long term effects from using any grade of fuel but there is no reason to use anything less than 91 as the cost savings over the long term is minimal. Even at 20 cents/gallon if you drive 15,000 miles/year and average 22 mpg that's about $136.00 annually on a $40K car.
In my experience using substandard fuel costs you more money when you factor in the decreased MPG.


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  #11  
Old 05-31-2013, 12:29 PM
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Wait? I can put 91 instead of 93 on my 335????


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Go with the 93.
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  #12  
Old 05-31-2013, 12:50 PM
Michael Schott Michael Schott is offline
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Originally Posted by Alpine300ZHP View Post
In my experience using substandard fuel costs you more money when you factor in the decreased MPG.


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Good point. Thank you.
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  #13  
Old 05-31-2013, 02:15 PM
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honest advise, nothing less than 92
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  #14  
Old 05-31-2013, 02:39 PM
#propaganda #propaganda is offline
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Fuel Grade?

Nuff said


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  #15  
Old 05-31-2013, 06:07 PM
tsantsa tsantsa is offline
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I have noticed better MPG with our 05 325xi on using either 91 or 93. Most places where I live (NW Indiana) have either 89 or 93 so we do 93 exclusively now. In my case, not only did we have lesser efficiency, the engine was very rough sounding. As in, not like a nice tough sound, but more like a hungover engine sound! I haven't tested this in the 06 330i though. Don't really plan to either.
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  #16  
Old 05-31-2013, 06:30 PM
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I know this is a mostly An USA site. I live north of the border-and our fuel is ...different...less sulphites and the ability to have 0 % ethanol.
I've been using Shell 91- with NO ethanol... The other option Is 94 octane with an allowable ..up to 10% ethanol.
I had my HPFP replaced with the recall. Should I still stay away from ethanol fuel?
What do think?
I will put the 94 in my next track day in June...gotta' love the ethanol free juice though!
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  #17  
Old 05-31-2013, 07:05 PM
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Fuel Grade?

It's an even swap as far as which octane to use. If you use 87 nothing will be damaged but you will lose a little in the mpg department and the vehicle "might" run a little rough. Using 91 or 93 will give you a little more mpg and the car will run as it should. Pay less (87) = less mpg. Pay more (91/93) = more mpg. It all evens out in the end. I personally use the higher octane 93 (91 isn't available usually) I would rather have my car run at optimal level. After all these are "performance" orientated vehicles right ???? BMWs are not cheap why use cheap fuel !


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Old 05-31-2013, 07:58 PM
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Quote:
Originally Posted by AbKosBMW11 View Post
Hello everyone! I'm a new & first time BMW owner. 2011 BMW 328i xDrive to be exact. I understand from the owner's manual that any Fuel with 89+ Octane rating would be sufficient. What are you BMW owner thoughts? Any long term engine effects?
This subject has been WIDELY discussed in this forum. Did you attempt to search it? Having said that, congrats on your new, FIRST TIME BMW...WELCOME...you won't be disappointed and we hope to see you in our "community" many times! There's a wealth of information in the "search" function...don't hesitate to use it as a first option!
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Last edited by pointandgo; 05-31-2013 at 08:01 PM.
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Old 05-31-2013, 08:05 PM
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This subject has been WIDELY discussed in this forum. Did you attempt to search it?

PNG you are asking for the moon and the stars!!!
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Old 05-31-2013, 08:09 PM
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PNG you are asking for the moon and the stars!!!
One must remain eternally optimistic.
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  #21  
Old 05-31-2013, 09:35 PM
MrKlean MrKlean is offline
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Fuel Grade?

I remember I think it was in Utah, I filled up with 101 octane. Man I wish we had that sh** in California lol


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Old 06-01-2013, 04:47 AM
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101 octane (EU rating, +/- 95 octane if it were the American test method) in Germany during ED. Far too early in the car's life to see any differences after I got it back home.
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Old 06-01-2013, 05:31 AM
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Quote:
Originally Posted by AbKosBMW11 View Post
Hello everyone! I'm a new & first time BMW owner. 2011 BMW 328i xDrive to be exact. I understand from the owner's manual that any Fuel with 89+ Octane rating would be sufficient. What are you BMW owner thoughts? Any long term engine effects?
My thoughts in this case are:

1) I bought the car to enjoy, therefore higher grade fuel = less knock = more power
2) see #1

I have used Costco Kirtland Signature Premium, Shell V Power 93 or Chevron 93 with no ill effects over 5 bimmers in 10 years.
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  #24  
Old 06-01-2013, 07:37 AM
Tom K. Tom K. is offline
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Originally Posted by MrKlean View Post
I remember I think it was in Utah, I filled up with 101 octane. Man I wish we had that sh** in California lol
Why? Unless it has been modified, your car is tuned for 91 octane so anything higher won't result in any more power - it will simply drain your wallet.

Tom
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Old 06-01-2013, 09:01 AM
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It says the min right on the fuel door, 91. Even the dealership said no reason to put 93 in it because there is hardly any benefits.

That said, i still fill up at AAFES or Sunoco and put 93.
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