R1200RS + R1250RS Forum
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Sun Aug 04, 2019 3:12 pm (Last edited: Sun Aug 04, 2019 3:20 pm)
Zitat von PeteN im Beitrag #87 My 2016 manual shows 89 AKI recommended and 87 AKI as a alternative. I see your attachment shows 90 AKI recommend for the 2020. When I use a online fuel calculator 95 RON converts to 91 AKI. Lee |
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Zitat von PeteN im Beitrag #92 If 89 AKI octane is "super" unleaded, what is 91 AKI octane called? Super-duper octane? And since when did the fuel tank hold 4.8 gallons? I know my tank won't hold that much fuel. 4.4 gallons is about all I can cram into it. However, my 2016 RS owner's manual says the same things. I just never bothered looking at it that closely before.
Current motorcycle collection: 2002 Yamaha FZ1; 2005 Triumph Bonneville T-100; 2011 Royal Enfield Bullet 500; 2009 BMW F650GS; 2016 BMW R1200RS; 2018 Zero S 16.6 kWh
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Zitat von Richard230 im Beitrag #93 Doesn't matter what the name is, I always go by the number on the pump. Some people get hung up on the name of the fuel. Different companies and different countries use different names. A name is just marketing. In the Midwest most stations 87 AKI is called Regular and 87 AKI with 10% Ethanol is called Super Unleaded. Still is not true for all stations in the Midwest. Gas 7-29-19 (1).jpg - Bild entfernt (keine Rechte) Gas 7-29-19 (1).jpg - Bild entfernt (keine Rechte)
Lee
2016 R1200RS Iowa, USA |
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My biggest fill up has been 4.78 gallons. If I remember right, I had gone about 10 miles past the 0 miles left warning. I always stuff the tank. More typical is 4.4 to 4.5 gallons. |
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Zitat von Richard230 im Beitrag #93 On my most recent trip to Wales I near empty the tank (range on -- for 4 miles or so) and I recall the petrol pump reading 18 something litres when I filled (where 4.8 US gallons = 18.17 litres according to google, which I haven't cross checked) so yes you can fit 4.8 US gallons in, you just need to empty it fully first  Jason. |
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Zitat von JasonQ im Beitrag #96Zitat von Richard230 im Beitrag #93 Well, that was probably my problem. While I tend to be a glass half full type of person, I prefer to be not be a glass completely empty person.
Current motorcycle collection: 2002 Yamaha FZ1; 2005 Triumph Bonneville T-100; 2011 Royal Enfield Bullet 500; 2009 BMW F650GS; 2016 BMW R1200RS; 2018 Zero S 16.6 kWh
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Yes at Barrie’s in York. Tried sitting only, GS std, lowseat, Low suspension, just about every permutation. |
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Mid grade for me. It’s what is specified, and as far as I can tell, it cures the double start thing that I got the one time I had to use premium. Mid grade on the east coast is 89 AKI. When you get to high altitude in the west, things change a bit. |
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Zitat von Bob Aint Stoppin im Beitrag #102 I found your comment on the "double start thing" interesting. I find when I let the bike sit a day or two it never starts on the first try. Why do you think that premium fuel would cause this (I've been running premium 91 R+M/2)? I also have an '18 R1200GS. It starts every time on the first try. Interestingly enough I put 87oct E10 fuel in that bike (which is an acceptable fuel for that model). Pete |
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Zitat von PeteN im Beitrag #103 I am beginning to suspect an octane related double start issue too. All along I have been using 89 Octane (USA AKI grade before this dips into another AKI/RON equivalent debate) as defined in the bikes manual. Never a start issue. Heard a ping once from the engine under load so decided to go up a grade to combat that (to 93 Octane) for the past 6 weeks. Immediately the bike has started having slow start/double start issues (especially on initial daily start, btw the battery is fine and fully charged) while starting under 93, otherwise it runs fine once going under 93. I am moving back to 89 to see if this slower starting condition subsides this week or along with the change back (and as coincidentally this topic is coming up on the forum about in real time with my experiences). |
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OK. So I don’t like getting technical . . . Mostly because I’m not very good at it. But, the higher the octane the slower, and more uniform, the burn. And I think, the harder to light off. (If you’d like, I can ask my brother to explain in more elaborate terms.) |
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