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Minimum octane fuel for 2020 K 1600

This is simple, just go by the sticker on the gas tank. My bike says 89 AKI, that is what I do!

From memory, my tank sticker said 89 and my manual said 91.
I used both, that way I had the correct fuel part of the time :)
I removed the sticker from both of our bikes :)
 
I typically run 94 octane, no ethanol. When in the US, its usually 91 or 92, with ethanol. I once had to run 87 octane for a full tank (the horror!). Didn't notice any difference.
 
I typically run 94 octane, no ethanol. When in the US, its usually 91 or 92, with ethanol. I once had to run 87 octane for a full tank (the horror!). Didn't notice any difference.

According to the on-line manual for the R1250RS, the 94 octane isn't needed

R1250RS - Fuel spec.png

The 2016 R1200RS manual specified 89AKI E10.
 
As noted above, the ShiftCam R 1250 (Euro 5 compliant) specifies 90 AKI. Weirdly enough, my 2016 R 1200 (Euro 4 compliant) said to use 89 AKI, a lower grade. Around here the pumps are 87/89/91. Because I can't get 90, my choices are 89 or 91 and rather than go to 91, I stick with what worked on the older bike (89), or whatever lower number the middle button is at altitude. I don't ride at 10/10 so giving up that last increment of theoretical performance doesn't matter. I could even have it programmed to use regular (87) and save a few bucks if I wanted, and it'd still be fine for the way I use it.
 
As noted above, the ShiftCam R 1250 (Euro 5 compliant) specifies 90 AKI. Weirdly enough, my 2016 R 1200 (Euro 4 compliant) said to use 89 AKI, a lower grade. Around here the pumps are 87/89/91. Because I can't get 90, my choices are 89 or 91 and rather than go to 91, I stick with what worked on the older bike (89), or whatever lower number the middle button is at altitude. I don't ride at 10/10 so giving up that last increment of theoretical performance doesn't matter. I could even have it programmed to use regular (87) and save a few bucks if I wanted, and it'd still be fine for the way I use it.

I don't think you need to have the R1250 engines re-programmed for the 87AKI. I believe, the ECU adapts. On the R1200 engines, it did call for the ECU to be re-programmed.
 
I don't think you need to have the R1250 engines re-programmed for the 87AKI. I believe, the ECU adapts. On the R1200 engines, it did call for the ECU to be re-programmed.

Yes, they adapt. They adapt to higher fuel consumption and less power.
 
As noted above, the ShiftCam R 1250 (Euro 5 compliant) specifies 90 AKI. Weirdly enough, my 2016 R 1200 (Euro 4 compliant) said to use 89 AKI, a lower grade.

Both probably recommend 89.5 AKI and one time BMW rounded down and one time rounded up :)
 
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