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Hi guys,
Not sure where screenshot from initial poster is coming from, but in my manual, the recommended fuel is listed as:
91 using the RON rating system – most widely used method worldwide.
87 using the AKI rating (also known as the R+M/2 method), mainly used in USA & Canada.
 

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Discussion Starter #6 (Edited)
Hi guys,
Not sure where screenshot from initial poster is coming from, but in my manual, the recommended fuel is listed as:
91 using the RON rating system – most widely used method worldwide.
87 using the AKI rating (also known as the R+M/2 method), mainly used in USA & Canada.
Its from Here: BMW Motorrad : Motocycles : Urban : G 310 R: Technical Data

My point was that output rating power was a result when using 98 octane,as i can see.

But i think octane to use on our bike can be different from country to country,as some places have other octane?
 

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Its from Here: BMW Motorrad : Motocycles : Urban : G 310 R: Technical Data
My point was that output rating power was a result when using 98 octane,as i can see.
Thanks for sharing the source... interesting to see there is a discrepancy with the website and the manual then. :confused:
On top of the Thailand website you provided, I've checked a few official BMW Motorrad sites (UK, France, Canada) and they all list RON 95.
My copy of owners manual lists RON 91.
 

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Discussion Starter #9 (Edited)
Thanks for sharing the source... interesting to see there is a discrepancy with the website and the manual then. :confused:
On top of the Thailand website you provided, I've checked a few official BMW Motorrad sites (UK, France, Canada) and they all list RON 95.
My copy of owners manual lists RON 91.
In Norway where i live: Minimum 95 octane
 

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fuel

Hi guys,
Not sure where screenshot from initial poster is coming from, but in my manual, the recommended fuel is listed as:
91 using the RON rating system – most widely used method worldwide.
87 using the AKI rating (also known as the R+M/2 method), mainly used in USA & Canada.
I'm going with the manual on this one, as for the difference in performance between 91 and 98 there isn't any as this is a relatively low compression motor tuned to 91 only. The fuel injection system is good but not sophisticated enough to make the most out of anything over 91 octane and the power and torque figures would have been done on 91 octane as well. This is a budget bike designed for developing countries and commuting duties in first world countries not a high end sports bike. :grin2:
 

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The only reason I use the 98ron is because I had a cold start issue initially and now it is gone after switching to 98ron. It may have been a run in issue that had nothing to do with the fuel. Next time I fill up I'll use 95 and see if I can detect a change or if the cold start issue comes back (although it's coming into summer here so the mornings are getting warmer). I should note that I don't know what the dealership put in the bike initially, it may have been 91ron.
 

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BMW stipulates a minimum octane rating of 95ron due to the high compression ratio (10.6:1).


In the US, the octane number is 4-6 octane numbers lower than the equivalent ron octane number elsewhere in the world. Hence a minimum 91octane (US version)


Any lower and you could have knocking issues. I don't know if the G310r has a knock sensor and dials back the ignition timing if it detects knocking, I suspect that it does.
 

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I'm soarcing most of my info off the owners manual as I find that answers most of my questions in regard to most things bike.

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Porth,
I do not think that there is any knock sensor with the 310 set up. It is really important to use octane high enough to prevent detonation because continued use of fuel of too low an octane can damage the head gasket which nobody wants to deal with!0:)
 

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I'm going with the manual on this one, as for the difference in performance between 91 and 98 there isn't any as this is a relatively low compression motor tuned to 91 only. The fuel injection system is good but not sophisticated enough to make the most out of anything over 91 octane and the power and torque figures would have been done on 91 octane as well. This is a budget bike designed for developing countries and commuting duties in first world countries not a high end sports bike. :grin2:
Couldn't have said it better myself. The good fuel available in first world countries may not be available in other places. It is an unstressed engine so there won't be any measurable power increase in regard to pinging resistance. (Of course, if you find your bike is pinging on the regular petrol in your country, go up a grade).

Basically, it will run on just about any grade of petrol, including E10. Save your money, and put the regular 'cheap' stuff in the tank. In Australia I'm running mine on plain Jane 91. It goes no better or worse than the 98 I was using.
 
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