Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)

E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old Yesterday, 08:55 PM
GVFlyer's Avatar
GVFlyer GVFlyer is online now
Officially Welcomed to the 'Fest
Location: USA
 
Join Date: Jun 2011
Posts: 639
Mein Auto: E92 M3/E90 328i xDrive
89 Octane for a 328i xDrive with N52 Motor?

Wifey has a 328i xDrive with the normally aspirated 12th Generation N52 I-6 motor. She is a high mileage commuter so her gas bills add up. Has anyone tried mid-grade fuel in their 6 cylinder 328i? If so, how did it work? Is there a noticeable decline in performance or mileage?
__________________

Mine

Hers

Daughters

http://www.specialops.org/
Reply With Quote
Advertisement
  #2  
Old Yesterday, 09:19 PM
BashedBarrique's Avatar
BashedBarrique BashedBarrique is online now
Officially Welcomed to the 'Fest
Location: Carmel Indiana
 
Join Date: Jan 2013
Posts: 1,010
Mein Auto: 2006 325i
Oh, boy. You're in for it now.

First some person, attempting to prove the popular canard about BMW driver's being A-holes, will rip you for not using the search feature to find the list of, like, 12,000 threads on this topic.

Then the people that fancy themselves members of the Society of Automotive Engineers, or honorary inductees into the American Petroleum Institute, will give you a condescending and mind-numbingly boring lecture on octane numbers, engine timing and pre-ignition.

Then the chemists, yes there will be more than one, will descend on you with a searing missive on volatile organic compounds and the evils of n-Heptane.

If, after all of that, you are still a registered Bimmerfest user, you will be visited by the knights of the order of München. These gate keepers will excoriate you for daring to question the sacred authority of your BMW issued owner's manual not to mention that official looking sticker inside the gas flap. "Perhaps you are not BMW material Heir GVFlyer. We vill have to see your papers now."

I'm going to turn away now, I'm a bit squeamish.

Good luck.
Reply With Quote
  #3  
Old Yesterday, 09:25 PM
pointandgo's Avatar
pointandgo pointandgo is offline
Officially Welcomed to the 'Fest
Location: Los Angeles area
 
Join Date: Apr 2010
Posts: 5,179
Mein Auto: '13 F10 535i (loaner)
Quote:
Originally Posted by BashedBarrique View Post
Oh, boy. You're in for it now.

First some person, attempting to prove the popular canard about BMW driver's being A-holes, will rip you for not using the search feature to find the list of, like, 12,000 threads on this topic.

Then the people that fancy themselves members of the Society of Automotive Engineers, or honorary inductees into the American Petroleum Institute, will give you a condescending and mind-numbingly boring lecture on octane numbers, engine timing and pre-ignition.

Then the chemists, yes there will be more than one, will descend on you with a searing missive on volatile organic compounds and the evils of n-Heptane.

If, after all of that, you are still a registered Bimmerfest user, you will be visited by the knights of the order of München. These gate keepers will excoriate you for daring to question the sacred authority of your BMW issued owner's manual not to mention that official looking sticker inside the gas flap. "Perhaps you are not BMW material Heir GVFlyer. We vill have to see your papers now."

I'm going to turn away now, I'm a bit squeamish.

Good luck.
__________________
F30 328i
E90 328i
E92 335i 6MT
E46 M3 6MT
E39 528i 5MT
MBz W140 S320
MBz W124 300E (slammed)
(unmentionables in between)
'71 AMC Javelin (4-Spd Stick on the floor)
'67 Pontiac Firebird 'cabrio' (1st car - "the leaker")
------------------------------------------------------------------------
Member: BMW CCA
Reply With Quote
  #4  
Old Yesterday, 09:28 PM
pointandgo's Avatar
pointandgo pointandgo is offline
Officially Welcomed to the 'Fest
Location: Los Angeles area
 
Join Date: Apr 2010
Posts: 5,179
Mein Auto: '13 F10 535i (loaner)
Quote:
Originally Posted by GVFlyer View Post
Wifey has a 328i xDrive with the normally aspirated 12th Generation N52 I-6 motor. She is a high mileage commuter so her gas bills add up. Has anyone tried mid-grade fuel in their 6 cylinder 328i? If so, how did it work? Is there a noticeable decline in performance or mileage?
I used 89 octane in my E90 IL-6 quite often with no adverse consequences. My BMW owner's manual says that it's OK.
__________________
F30 328i
E90 328i
E92 335i 6MT
E46 M3 6MT
E39 528i 5MT
MBz W140 S320
MBz W124 300E (slammed)
(unmentionables in between)
'71 AMC Javelin (4-Spd Stick on the floor)
'67 Pontiac Firebird 'cabrio' (1st car - "the leaker")
------------------------------------------------------------------------
Member: BMW CCA
Reply With Quote
  #5  
Old Yesterday, 09:40 PM
BashedBarrique's Avatar
BashedBarrique BashedBarrique is online now
Officially Welcomed to the 'Fest
Location: Carmel Indiana
 
Join Date: Jan 2013
Posts: 1,010
Mein Auto: 2006 325i
Quote:
Originally Posted by pointandgo View Post
I used 89 octane in my E90 IL-6 quite often with no adverse consequences. My BMW owner's manual says that it's OK.
Yeah, me too. Even 87 octane sometimes. But, I'm not kidding that their will be many people that tell you not to do it for a variety of reasons.

I know the engine management system will retard the timing to stop detonation and this will affect performance and mileage. But at 30 to 50 cents a gallon difference in price for the lower octane gas, it would take a pretty healthy dip in mileage to offset the lower price.

That said I always put in 93 octane premium if it's available (unless I space it and just pump 87 from habit), since I don't drive my Bimmer on a daily basis, and I want to feel like I'm pampering her.
Reply With Quote
  #6  
Old Yesterday, 09:43 PM
GVFlyer's Avatar
GVFlyer GVFlyer is online now
Officially Welcomed to the 'Fest
Location: USA
 
Join Date: Jun 2011
Posts: 639
Mein Auto: E92 M3/E90 328i xDrive
Quote:
Originally Posted by BashedBarrique View Post
Oh, boy. You're in for it now.

First some person, attempting to prove the popular canard about BMW driver's being A-holes, will rip you for not using the search feature to find the list of, like, 12,000 threads on this topic.

Then the people that fancy themselves members of the Society of Automotive Engineers, or honorary inductees into the American Petroleum Institute, will give you a condescending and mind-numbingly boring lecture on octane numbers, engine timing and pre-ignition.

Then the chemists, yes there will be more than one, will descend on you with a searing missive on volatile organic compounds and the evils of n-Heptane.

If, after all of that, you are still a registered Bimmerfest user, you will be visited by the knights of the order of München. These gate keepers will excoriate you for daring to question the sacred authority of your BMW issued owner's manual not to mention that official looking sticker inside the gas flap. "Perhaps you are not BMW material Heir GVFlyer. We vill have to see your papers now."

I'm going to turn away now, I'm a bit squeamish.

Good luck.
Vestigially true or apocryphal, that's hilarious!
__________________

Mine

Hers

Daughters

http://www.specialops.org/
Reply With Quote
  #7  
Old Yesterday, 09:54 PM
Mark K's Avatar
Mark K Mark K is online now
Officially Welcomed to the 'Fest
Location: Cincinnati, OH
 
Join Date: Jun 2010
Posts: 2,313
Mein Auto: 2011 E92 335i MT
On these threads I always say "Open your gas door. Read what it says. Do it or don't, it is your car." Period.

I just did 700 mostly highway miles in Ford's 2.0 240 hp turbocharged Fusion. Without even thinking about it I fueled with regular. However, after 2 WTF stops (way too soon to be empty), I started wondering. My mileage was 24 mpg exclusively highway miles at 75 mph mostly. That's worse than my 3.0 liter turbo N55 on premium 93 octane fuel. A LOT worse, N55 would have returned 30 mpg without breaking a sweat.

So ... long story short ... why don't you try one tank and then decide if it is even worth it?

Sent from BimmerApp mobile app
__________________

_____________________________________________

2011 E92 335i 6MT ZSP ZCW (ED May 17th 2010)

2013 118d BMWNA Special Edition. Black on black cloth (yay!), 5 door hatchback, 140hp diesel. Special edition items: factory debadge| "VW", "Golf" and "TDI" badges factory applied | MT | Standard go flat tires | Spare tire (yay!) | No moonroof (yay!) .
Reply With Quote
  #8  
Old Yesterday, 10:19 PM
pointandgo's Avatar
pointandgo pointandgo is offline
Officially Welcomed to the 'Fest
Location: Los Angeles area
 
Join Date: Apr 2010
Posts: 5,179
Mein Auto: '13 F10 535i (loaner)
Quote:
Originally Posted by BashedBarrique View Post
Yeah, me too. Even 87 octane sometimes. But, I'm not kidding that their will be many people that tell you not to do it for a variety of reasons.

I know the engine management system will retard the timing to stop detonation and this will affect performance and mileage. But at 30 to 50 cents a gallon difference in price for the lower octane gas, it would take a pretty healthy dip in mileage to offset the lower price.

That said I always put in 93 octane premium if it's available (unless I space it and just pump 87 from habit), since I don't drive my Bimmer on a daily basis, and I want to feel like I'm pampering her.
I always used premium gas...not 'alcohol' blended gas. I never experienced 'knocking' even when driving to the mountains...9,000'+. Yes, I used 92 octane once in a while.
__________________
F30 328i
E90 328i
E92 335i 6MT
E46 M3 6MT
E39 528i 5MT
MBz W140 S320
MBz W124 300E (slammed)
(unmentionables in between)
'71 AMC Javelin (4-Spd Stick on the floor)
'67 Pontiac Firebird 'cabrio' (1st car - "the leaker")
------------------------------------------------------------------------
Member: BMW CCA
Reply With Quote
  #9  
Old Today, 07:14 AM
aloyouis aloyouis is offline
Officially Welcomed to the 'Fest
Location: MI
 
Join Date: May 2005
Posts: 166
Mein Auto: 2009 328i Xdrive
Quote:
Originally Posted by BashedBarrique View Post
Oh, boy. You're in for it now.

First some person, attempting to prove the popular canard about BMW driver's being A-holes, will rip you for not using the search feature to find the list of, like, 12,000 threads on this topic.

Then the people that fancy themselves members of the Society of Automotive Engineers, or honorary inductees into the American Petroleum Institute, will give you a condescending and mind-numbingly boring lecture on octane numbers, engine timing and pre-ignition.

Then the chemists, yes there will be more than one, will descend on you with a searing missive on volatile organic compounds and the evils of n-Heptane.

If, after all of that, you are still a registered Bimmerfest user, you will be visited by the knights of the order of München. These gate keepers will excoriate you for daring to question the sacred authority of your BMW issued owner's manual not to mention that official looking sticker inside the gas flap. "Perhaps you are not BMW material Heir GVFlyer. We vill have to see your papers now."

I'm going to turn away now, I'm a bit squeamish.

Good luck.
Thanks for making me giggle through your entire (-ly accurate) post!
Reply With Quote
  #10  
Old Today, 08:32 AM
need4speed's Avatar
need4speed need4speed is offline
Officially Welcomed to the 'Fest
Location: South Carolina
 
Join Date: May 2006
Posts: 3,133
Mein Auto: 09 335Cabrio zsp/11 335d
Quote:
Originally Posted by BashedBarrique View Post
Oh, boy. You're in for it now.

First some person, attempting to prove the popular canard about BMW driver's being A-holes, will rip you for not using the search feature to find the list of, like, 12,000 threads on this topic.

Then the people that fancy themselves members of the Society of Automotive Engineers, or honorary inductees into the American Petroleum Institute, will give you a condescending and mind-numbingly boring lecture on octane numbers, engine timing and pre-ignition.

Then the chemists, yes there will be more than one, will descend on you with a searing missive on volatile organic compounds and the evils of n-Heptane.

If, after all of that, you are still a registered Bimmerfest user, you will be visited by the knights of the order of München. These gate keepers will excoriate you for daring to question the sacred authority of your BMW issued owner's manual not to mention that official looking sticker inside the gas flap. "Perhaps you are not BMW material Heir GVFlyer. We vill have to see your papers now."

I'm going to turn away now, I'm a bit squeamish.

Good luck.
d@mn funny. Yes you can, you might not get all the performance the motor is capable of. N4S
Reply With Quote
  #11  
Old Today, 09:30 AM
Robin128 Robin128 is offline
Officially Welcomed to the 'Fest
Location: Cardiff, Wales
 
Join Date: Oct 2012
Posts: 276
Send a message via ICQ to Robin128
Mein Auto: 335i auto, Volvo T5 man
Personally I believe there is no increase in power from using a higher octane than the range suggested by BMW. In addition, I believe a lower octane than the suggested range will cause some ignition problems that could ultimately lead to the risk of engine damage. Furthermore, the higher octanes usually mean additives included to protect the engine.


Love the sense of humour above.

__________________


One should treat others as one would like others to treat oneself.
Reply With Quote
  #12  
Old Today, 11:09 AM
wilt wilt is offline
Officially Welcomed to the 'Fest
Location: SF Bay area
 
Join Date: Jan 2014
Posts: 1,025
Mein Auto: 2011 328i
Been driving BMWs now for going on 40 years, beginning with 2002. For my last car, E46 325i, the fuel requirement was Premium Unleaded Gasoline, min. 91 AKI. Fairly early on with that car I departed from Premium and tried 89 octance, and experiencing no apparent negative effects, I continued for just short of 140k miles with no apparent ill effects that might be attributed to sub-par fuel. My E90 328i is generally run on 89 octane, too, although I have put premium into both the E46 and the E90 and not noticed a substantial change in performance/economy when on Premium. If I had a 335i with turbocharger boosting pressures, I might not try to run on 89 octane.

According to Chevron, the Heat Value of the fuel is directly related to MPG, and the Heat Value of Premium would result in only a very tiny increase in MPG. A drop of 2.7% in heating value results in 2.7% drop of MPG...25MPG becomes 24.3MPG, and the variability of driving, from tank to tank, masks such an inconsequential difference. Spending 6% more to buy gas with only 1% higher Heat Value means 6% greater cost vs. 1% better MPG!

Last edited by wilt; Today at 11:14 AM.
Reply With Quote
  #13  
Old Today, 12:22 PM
Zooks527's Avatar
Zooks527 Zooks527 is offline
Officially Welcomed to the 'Fest
Location: Mansfield, MA
 
Join Date: Mar 2009
Posts: 4,048
Mein Auto: 2009 335i xDrive coupe
Quote:
Originally Posted by wilt View Post
According to Chevron, the Heat Value of the fuel is directly related to MPG, and the Heat Value of Premium would result in only a very tiny increase in MPG. A drop of 2.7% in heating value results in 2.7% drop of MPG...25MPG becomes 24.3MPG, and the variability of driving, from tank to tank, masks such an inconsequential difference. Spending 6% more to buy gas with only 1% higher Heat Value means 6% greater cost vs. 1% better MPG!
Oh, dear God, the Chevron report about heat values rears its head again.

There are two quotes of note at which to look.

First:
"Different grades of gasoline may have small differences in heating value (see sidebar definition), but they provide comparable power in a given engine as long as their antiknock performance meets the engine's requirement"
Generalizations about heating value et al are dependent upon the meeting the engine octane requirement, which is premium in BMW engines. It would also be reasonable to assume that the test was performed on engines that were not retarding their timing during the test (i.e. they ran the test with fuel appropriate for the engines in questions). Essentially, going to a higher grade than the engine requires gains you little. You cannot extrapolate in the other direction.


Second:
"In the test, the newer fleet was composed of 1989 model-year cars and the older fleet included 1984–1985 model-year cars. "
It's data from a test described in a 1993 paper using cars from 26-31 years ago. There's a real good shot that you're looking at data from carbureted models, and probably nothing in the test is remotely similar to modern fuel injected engines. It's a stretch to try to drag it this far forward.



Quoting the Chevron report on mileage vs. heat value gives you data derived from cars made when Ronald Reagan and the first George Bush were the presidents and only applies if the timing isn't being retarded. It can't be used to make generalized statements about mileage using fuel with an octane rating below that which the engine design calls for.



For anyone who wants to go to the source: http://www.academia.edu/7136851/6908...as_Tech_Review
__________________
2009 335i xDrive coupe, Jet Black, Black Leather, Grey Poplar, Steptronic, ZPP, ZSP, ZCW, iPod/USB, HD radio, Parking Assist. Rear Fogs, Hardwire V1, ProFit G3.
ED May 12, 2009, Munich dropoff May 16, Redelivery June 22, 2009




Prior 33 years of cars: 1967 BelAir wagon / 1968 LeMans Tempest / 1970 Mustang Mach 1 / 1972 El Dorado / 1978 Corvette (kept until first Bronco) / 1981 Subaru GL wagon AWD / 1983 s10 Blazer 4x4 (big mistake) / 1985 Bronco 4x4 / 1996 Bronco 4x4 / 2004 Passat 4motion

Last edited by Zooks527; Today at 12:53 PM.
Reply With Quote
  #14  
Old Today, 01:29 PM
BashedBarrique's Avatar
BashedBarrique BashedBarrique is online now
Officially Welcomed to the 'Fest
Location: Carmel Indiana
 
Join Date: Jan 2013
Posts: 1,010
Mein Auto: 2006 325i
Quote:
Originally Posted by Zooks527 View Post
Oh, dear God, the Chevron report about heat values rears its head again.

There are two quotes of note at which to look.
And we're off..

Zooks are you a Chemist by any chance?
Reply With Quote
  #15  
Old Today, 02:11 PM
blue boy's Avatar
blue boy blue boy is online now
Officially Welcomed to the 'Fest
Location: south of east
 
Join Date: Nov 2013
Posts: 423
Mein Auto: 2011 328ix
Quote:
Originally Posted by GVFlyer View Post
Wifey has a 328i xDrive with the normally aspirated 12th Generation N52 I-6 motor. She is a high mileage commuter so her gas bills add up. Has anyone tried mid-grade fuel in their 6 cylinder 328i? If so, how did it work? Is there a noticeable decline in performance or mileage?
your gas door will lock itself forever, your tires will fall off and you will be stuck
auto eng
__________________
surely goodness and mercy will follow us all the days of our lives

2011 328IX
Ford 150
Gen 3 Prius
Goldwing Trike
Mustang with mods
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 08:33 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms