Octane rating needed for full performance ? - Page 3 - BMW M5 Forum and M6 Forums

Go Back   BMW M5 Forum and M6 Forums > BMW M5, M5 Touring, M6 and Z8 Forums > E60 M5 and E61 M5 Touring Discussion

E60 M5 and E61 M5 Touring Discussion 2005- Advertiser's Forum


Reply
 
LinkBack Thread Tools Rate Thread Display Modes
Old 6th January 2006, 20:31   #21
Wolverine
M5 Guru (>2000 posts)
 
Wolverine's Avatar
 
Join Date: Mar 2004
Location: Ohio

Garage: BMW E60 M5 Silverstone II/Silverstone/Aluminum

Sales Feedback: (0)

Thanks: 29
Thanked 191 Times in 132 Posts
Quote:
Originally Posted by richhaywood
I've just scanned an article from Evo magazine (uk) testing octane ratings on the M5, its about 10mb though, can i email it to anyone to host it ?
Can you give us a summary?
__________________
Mike
Wolverine is offline   Reply With Quote
Old 6th January 2006, 20:36   #22
richhaywood
Member
 
richhaywood's Avatar
 
Join Date: Apr 2004
Location: England

Garage: Black BMW M5

Sales Feedback: (0)

Thanks: 0
Thanked 0 Times in 0 Posts
heres a link: http://groups.msn.com/M5Webspace/sho...hoto&PhotoID=2

ok sorry that didn't come out as clearly as i thought, basically the shell optimax gave 518bhp, BP ultimate 534bhp, but basically they thought the M5's computer is that quick that it compensates for having a poorer quality fuel. It also made a key point, don't buy petrol (gas) from a garage that doesn't get used often as its not the octane that reduces the power but fuel that is not "fresh." This is due to fuels having differen coctails of cleaners in them.


Hope this helps

Last edited by richhaywood; 6th January 2006 at 23:52.
richhaywood is offline   Reply With Quote
Old 6th January 2006, 21:28   #23
Wolverine
M5 Guru (>2000 posts)
 
Wolverine's Avatar
 
Join Date: Mar 2004
Location: Ohio

Garage: BMW E60 M5 Silverstone II/Silverstone/Aluminum

Sales Feedback: (0)

Thanks: 29
Thanked 191 Times in 132 Posts
Quote:
Originally Posted by richhaywood
heres a link: http://groups.msn.com/M5Webspace/sho...hoto&PhotoID=2

ok sorry that didn't come as clearly as i thought, basically the shell optimax gave 518bhp BP ultimate, 534bhp but basically they thought the M5's computer is that quick that it compensates for having a poorer quality fuel. It also made a key point, don't buy petrol (gas) from a garage that doesn't get used often as its not the octane that reduces the power but fuel that is not "fresh." This is due to fuels having differeny coctails of cleaners in them.#


Hope this helps
Octane ratings of the Shell and BP? The 534 sounds very very strong. Was this measured at the crank, or calculated based on WHP? Did they get a WHP reading? Thanks for the post.
Wolverine is offline   Reply With Quote
Old 6th January 2006, 21:48   #24
NobleM400
Company Representative of RPI Power
 
NobleM400's Avatar
 
Join Date: Jan 2006
Location: RPV

Garage: 06 BMW M5 Silver Gray Metallic

Sales Feedback: (0)

Thanks: 78
Thanked 516 Times in 330 Posts
Quote:
Originally Posted by richhaywood
I've just scanned an article from Evo magazine (uk) testing octane ratings on the M5, its about 10mb though, can i email it to anyone to host it ?
Email it to me, I'll photoshop to a readable size and host. email me
NobleM400 is offline   Reply With Quote
Old 6th January 2006, 21:57   #25
SWP
m5board.comoholic (>1000 posts)
 
SWP's Avatar
 
Join Date: Aug 2005
Location: California, USA

Garage: 2006 M5 Black Sapphire Metallic

Sales Feedback: (0)

Thanks: 1
Thanked 6 Times in 6 Posts
Your M5 will run just fine on 91 octane (Premium in CA).

Modern engine all have anti-knock systems that will adapt the engine to lower than recommended octane levels.

BMW recommends 92 octane for the M5, but 91 octane is readily available in CA because they add that gasoline derivative for environmental purposes (I can't remember the name).

The one octane difference will not affect performance. It may reduce your fuel consumption a bit, but nothing to worry about.
SWP is offline   Reply With Quote
Old 6th January 2006, 22:40   #26
brutus
Addicted Member (>300 posts)
 
brutus's Avatar
 
Join Date: May 2000
Location: San Ramon, CA, USA

Garage: '06 E60 M5 Black Sapphire Metallic / Inianapolis Red Full Leather

Sales Feedback: (0)

Thanks: 0
Thanked 4 Times in 4 Posts
Quote:
Originally Posted by SWP
Your M5 will run just fine on 91 octane (Premium in CA).

Modern engine all have anti-knock systems that will adapt the engine to lower than recommended octane levels.

BMW recommends 92 octane for the M5, but 91 octane is readily available in CA because they add that gasoline derivative for environmental purposes (I can't remember the name).

The one octane difference will not affect performance. It may reduce your fuel consumption a bit, but nothing to worry about.
I don't think so or BMW wouldn't have put in the Euro English manual:

"> The engine of your BMW M5 is rated to run on: Super Plus/premium plus fuel, octane number 98 RON. Fill up with fuel of this grade whenever possible, so that hte niminal performance and fuel consumption values are achieved."

And: "> The minum permissible grade is: Premium-grade unleaded fuel, octane number 95 RON."

Don't have my US manual handy but 98 RON is ~~ 93 AKI or (RON+MON)/2 as we use in the US and ~~ 91 AKI for minum permissible grade.

It's true the car will run on 91 due to anti knock sensors but what do you think the EMC does when it sense knock ? What it does will definitely impact performance.

Further, the nominal value for octaine is based on atmospheric conditions that are nearly ideal (altitude: sea-level, humidity: moderate (don't remember the value), and tempature: moderate (don't remember)) so the higer the altitude, the lower the humidity, and the higher the tempature all increase the octane required.

So, where did you get your info about octane rating required for performance of an M5 ?

Brutus
__________________
'06 Black Saphire Metalic / Indy Red / Aluminum
Full Leather / Comfort Access / Multi-function Seats
Fold Down Rear Seats / HUD / Serius Satellite Radio
brutus is offline   Reply With Quote
Old 6th January 2006, 23:45   #27
SWP
m5board.comoholic (>1000 posts)
 
SWP's Avatar
 
Join Date: Aug 2005
Location: California, USA

Garage: 2006 M5 Black Sapphire Metallic

Sales Feedback: (0)

Thanks: 1
Thanked 6 Times in 6 Posts
I make it up, of course.



Actually, I read it on an issue of Road & Track way back when . . .

Quote:
Originally Posted by brutus
I don't think so or BMW wouldn't have put in the Euro English manual:

"> The engine of your BMW M5 is rated to run on: Super Plus/premium plus fuel, octane number 98 RON. Fill up with fuel of this grade whenever possible, so that hte niminal performance and fuel consumption values are achieved."

And: "> The minum permissible grade is: Premium-grade unleaded fuel, octane number 95 RON."

Don't have my US manual handy but 98 RON is ~~ 93 AKI or (RON+MON)/2 as we use in the US and ~~ 91 AKI for minum permissible grade.

It's true the car will run on 91 due to anti knock sensors but what do you think the EMC does when it sense knock ? What it does will definitely impact performance.

Further, the nominal value for octaine is based on atmospheric conditions that are nearly ideal (altitude: sea-level, humidity: moderate (don't remember the value), and tempature: moderate (don't remember)) so the higer the altitude, the lower the humidity, and the higher the tempature all increase the octane required.

So, where did you get your info about octane rating required for performance of an M5 ?

Brutus

Last edited by SWP; 6th January 2006 at 23:48.
SWP is offline   Reply With Quote
Old 6th January 2006, 23:47   #28
SWP
m5board.comoholic (>1000 posts)
 
SWP's Avatar
 
Join Date: Aug 2005
Location: California, USA

Garage: 2006 M5 Black Sapphire Metallic

Sales Feedback: (0)

Thanks: 1
Thanked 6 Times in 6 Posts
I just buy Premium gas from my nearby Shell station. Car seems to run just fine.
SWP is offline   Reply With Quote
Old 7th January 2006, 01:23   #29
NobleM400
Company Representative of RPI Power
 
NobleM400's Avatar
 
Join Date: Jan 2006
Location: RPV

Garage: 06 BMW M5 Silver Gray Metallic

Sales Feedback: (0)

Thanks: 78
Thanked 516 Times in 330 Posts
Quote:
Originally Posted by brutus
I don't think so or BMW wouldn't have put in the Euro English manual:

"> The engine of your BMW M5 is rated to run on: Super Plus/premium plus fuel, octane number 98 RON. Fill up with fuel of this grade whenever possible, so that hte niminal performance and fuel consumption values are achieved."

And: "> The minum permissible grade is: Premium-grade unleaded fuel, octane number 95 RON."

Don't have my US manual handy but 98 RON is ~~ 93 AKI or (RON+MON)/2 as we use in the US and ~~ 91 AKI for minum permissible grade.

It's true the car will run on 91 due to anti knock sensors but what do you think the EMC does when it sense knock ? What it does will definitely impact performance.

Further, the nominal value for octaine is based on atmospheric conditions that are nearly ideal (altitude: sea-level, humidity: moderate (don't remember the value), and tempature: moderate (don't remember)) so the higer the altitude, the lower the humidity, and the higher the tempature all increase the octane required.

So, where did you get your info about octane rating required for performance of an M5 ?

Brutus
Here's a handy chart on RON/PON conversion:

http://www.btinternet.com/~madmole/R...RONMONPON.html

98 RON = 94 PON
95 RPM = 91 PON

richhaywood:

Got the file. Wow, 19mb. Anyhow, it's rotated, cropped, resized, and attached here. If anyone needs it bigger, just let me know.
Attached Thumbnails
Octane rating needed for full performance ?-m5_article_s.jpg  

NobleM400 is offline   Reply With Quote
Old 8th January 2006, 22:21   #30
richhaywood
Member
 
richhaywood's Avatar
 
Join Date: Apr 2004
Location: England

Garage: Black BMW M5

Sales Feedback: (0)

Thanks: 0
Thanked 0 Times in 0 Posts
thanks for editing the pic NobleM400
richhaywood is offline   Reply With Quote
Reply

Bookmarks



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
IMPORTANT FOR E34 M5 OWNERS! Old M5 Messageboard Archive. Help Needed! Gustav E34 M5 Discussion 10 17th June 2010 04:19
M5 Vs. Corvette C5 BRN64666 E39 M5 and E52 Z8 Discussion 51 8th December 2003 01:28
Performance Package for NA spec 330i KRM GTBoard.com: General Sportscars 3 18th February 2003 14:56
Who uses toluene as octane booster Vigilant E39 M5 and E52 Z8 Discussion 5 16th October 2002 19:46
BMW Performance Center 2002 Driving Schedule blue max E39 M5 and E52 Z8 Discussion 2 11th February 2002 23:51

Loading...

All times are GMT +2. The time now is 00:06.



Everything Copyright 2000-2008. Do not use ANYTHING from this site without written permission. All images, graphics, sound files, video files and text appearing on this web site are the exclusive property of m5board.com and are protected under international copyright laws. All images, graphics, sound files, video files and text on this site are for on-screen and on-site viewing and listening only. No part of this web site may be reproduced, copied, saved, stored, manipulated, or used in any form for personal or commercial purposes without the prior written permission of m5board.com. Use of any image or graphic as the basis for another photographic concept or illustration is a violation of the copyright. Any copyright infringement will be prosecuted to the full extent of federal and international copyright laws. M5board.com is an enthusiast board and we don't condone any dangerous activity. Our airfield events are completely safe based on years of experience, we conduct them during clear visibility with mature participants that have several years of experience with high-performance automobiles, large unobstructed run-off zones on sealed off private former military airbases and we clearly mark the braking zones. If inexperienced with high speed driving we do not recommend organizing your own event but attending a high-performance driving school. The use of the term "BMW" on this site is for reference only, and does not imply any connection between m5board.com and BMW AG or BMW North America.