Bmw E90 Fuel Ron

Ahmed Sadek · 10-21-2010, 01:37 AM

Hey guys, have a question : what's the BMW recommended fuel RON to get optimum performance (catalogue figures) , i have 320i 2008 ,

F32Fleet · 10-21-2010, 07:31 AM

~95 or above.

Ahmed Sadek · 10-22-2010, 02:32 AM

i found that in the user's manual 91 ron is minimum , does this mean that performance figures are tested using this ron 91?

F32Fleet · 10-22-2010, 06:53 AM

I'd think of that as being more of a legal question in your country. Personally I wouldn't worry about it. If you use fuel which is a little lower than 91 RON your engine will make the necessary adjustments but loose just a bit of power. BMW is typically conservative in their numbers anyways.

Tom K. · 10-22-2010, 09:19 AM

Quote:

Originally Posted by Ahmed Sadek

i found that in the user's manual 91 ron is minimum , does this mean that performance figures are tested using this ron 91?

Probably not. What is recommended in the manual - 95 or 98? The US 128i/328i manuals recommend AKI 91 with 87 minimum. That would translate to about 95 and 91 RON.

My BMW R1200RT motorcycle is specified to develop 110 hp with 98 RON but only 101 with 91, so I would assume something similar is operating with the cars. When I had to use 91 RON for a couple of tanks, the knock sensor eliminated detonation, but the fuel economy did seem to suffer a bit.

Tom

scrufy · 10-22-2010, 09:40 AM

BMW Manuals

Heres a link to the manual- free at BMW.
Wouldn't have service info but that kind of stuff is usually there.

scrufy · 10-22-2010, 09:44 AM

Quote:

Originally Posted by Tom K.

When I had to use 91 RON for a couple of tanks, the knock sensor eliminated detonation, but the fuel economy did seem to suffer a bit.
Tom

Hey thanks!
Thats a good point. I didn't even think about the lower gas milage that goes along with the huge performance hit. Just more reason for me to love good old California Gas!

Ahmed Sadek · 10-24-2010, 02:02 AM

Thanks alot fellows

bimmercontrol · 10-24-2010, 07:22 AM

95RON should be the minimum you put in a BMW, just like 91AKI that you would put in, sure you could use 91RON or 87AKI but its really not recommended at all.

i found the car runs just fine with 95RON but the manual even recommends to go for 98RON, i usually fill up 100RON at OMV , makes a difference for the turbo engine and mountains

p.s i dont know if egypt has leaded fuel or not, be careful

10-21-2010, 01:37 AM	#1
Ahmed Sadek Enlisted Member 8 Rep 39 Posts Drives: E90 320i 2008 Join Date: Jul 2010 Location: EGYPT iTrader: (0)	Bmw E90 Fuel Ron Hey guys, have a question : what's the BMW recommended fuel RON to get optimum performance (catalogue figures) , i have 320i 2008 ,
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10-21-2010, 07:31 AM	#2
F32Fleet Lieutenant General 3572 Rep 10,352 Posts Drives: 2015 435i Join Date: May 2005 Location: Southeastern US iTrader: (0)	~95 or above.
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10-22-2010, 02:32 AM	#3
Ahmed Sadek Enlisted Member 8 Rep 39 Posts Drives: E90 320i 2008 Join Date: Jul 2010 Location: EGYPT iTrader: (0)	i found that in the user's manual 91 ron is minimum , does this mean that performance figures are tested using this ron 91?
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10-22-2010, 06:53 AM	#4
F32Fleet Lieutenant General 3572 Rep 10,352 Posts Drives: 2015 435i Join Date: May 2005 Location: Southeastern US iTrader: (0)	I'd think of that as being more of a legal question in your country. Personally I wouldn't worry about it. If you use fuel which is a little lower than 91 RON your engine will make the necessary adjustments but loose just a bit of power. BMW is typically conservative in their numbers anyways. Last edited by F32Fleet; 10-22-2010 at 06:58 AM..
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10-22-2010, 09:40 AM	#6
scrufy Zoom Zoom This 12 Rep 694 Posts Drives: The Short Bus Join Date: Jul 2010 Location: So. Cal. iTrader: (0)	BMW Manuals Heres a link to the manual- free at BMW. Wouldn't have service info but that kind of stuff is usually there.
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10-24-2010, 02:02 AM	#8
Ahmed Sadek Enlisted Member 8 Rep 39 Posts Drives: E90 320i 2008 Join Date: Jul 2010 Location: EGYPT iTrader: (0)	Thanks alot fellows
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10-24-2010, 07:22 AM	#9
bimmercontrol Second Lieutenant 11 Rep 237 Posts Drives: E92 335i Join Date: Feb 2010 Location: Balkans iTrader: (0) Garage List 2007 335i [0.00]	95RON should be the minimum you put in a BMW, just like 91AKI that you would put in, sure you could use 91RON or 87AKI but its really not recommended at all. i found the car runs just fine with 95RON but the manual even recommends to go for 98RON, i usually fill up 100RON at OMV , makes a difference for the turbo engine and mountains p.s i dont know if egypt has leaded fuel or not, be careful
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