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Old 02-06-2009, 07:33 PM   #16
BikerDav OP
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Its not a matter of cost. I have been close to empty, come to a gas station and all they sold or had was 87.
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Old 02-07-2009, 11:11 PM   #17
The Griz
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There's a sticker on the gas cap that says "minimum 89 AKI (Anti-Knock Index). That settles it. Medium grade. Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), and (R+M)/2 are all the same measurement.
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Old 02-08-2009, 11:45 PM   #18
RedHawk47
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Quote:
Originally Posted by The Griz
There's a sticker on the gas cap that says "minimum 89 AKI (Anti-Knock Index). That settles it. Medium grade. Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), and (R+M)/2 are all the same measurement.
The sticker says "Premium"; minimum intermediate 89. To me that says use premium; if not available it's OK to use 89.
IMO I don't need to pinch my pennies - if I did I would not be riding a new BMW - so I buy the better grade - and I buy it at the better gas stations.
But, I also don't worry if I have to buy a lower grade because that's all that's available - I just take it easy on the throttle til I fill up again with premium.

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Old 02-09-2009, 12:24 AM   #19
rockinrog
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aki

The AKI (anti-knock index -- also known as "octane rating") of the fuel
is an average of two different methods of computing the fuel's ability
to resist engine knock. Regular unleaded gas in the U.S. has an
anti-knock index of 87, while mid-grade is usually 89, and premium
typically is 91 - 93. The higher the number, the more anti-knock
protection the fuel offers
this article is come from http://www.tech78.com/auto/AKI_685611.html
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Old 02-12-2009, 07:28 PM   #20
JRWooden
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650GS is 87 AKI

Least anyone get (more) confused

The F650GS (twin) is rated for 87 AKI (per the sticker on my tank anyway).
I burn premium anyway ... unless I can't get it ... that was the case for a couple weeks here in the southeast during the last minor gas shortage we had here....
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Old 02-12-2009, 08:11 PM   #21
M N B
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Carry a bottle of octane boost when travelling in remote areas. That's what I do. I just pour a bit in and ride on.
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Old 02-12-2009, 08:19 PM   #22
10Cup
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I run 87 octain in mine since the day it left the dealer and it is happy as a clam. Don't need no steeekn premium
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Old 02-13-2009, 03:28 AM   #23
LDHunter
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Quote:
Originally Posted by M N B
Carry a bottle of octane boost when travelling in remote areas. That's what I do. I just pour a bit in and ride on.
Thanks... I was fixin' to say the same thing... Some people gotta agonize over non-issues.... Maybe they should get away from their keyboards and ride.

Spring is here! In Florida anyway....

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Old 02-13-2009, 08:13 AM   #24
Bucko
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Quote:
Originally Posted by 10Cup
I run 87 octain in mine since the day it left the dealer and it is happy as a clam. Don't need no steeekn premium
Runs fine, yes. But the risk of detonation cratering your pistons with a 12:1 compression ratio is real.
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Old 02-14-2009, 04:20 AM   #25
Bigem
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Ours are tuned to run on 95RON, but if you are lucky, 1 in 10 petrol stations actually carry it?? The standard shit we have is 91RON, which you have to use because premium is not available!!

Anyways, I put total faith in the OBC today because it was pissing rain and we had to cover about 700ks in the rain and where running 110-130kph/65-80mph most of the time.
At one stage it told me that I had 9 kilometers until empty, and it was pretty close to right because when I filled it up, I got 16.01litres into the tank!! Must have been running on air!!

Best bike in the world I reckon!! Brilliant.
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