Page 1 of 2 1 2 LastLast
Results 1 to 15 of 20

Thread: Reg. gas for an RT?

  1. #1

    Reg. gas for an RT?

    On P. 181 of my owners manual (2018 RT) it says something about reprogramming the computer to accept 87 AKI fuel.

    What da heck is AKI...is that for the USA.

    I been putting 92 but apparently it says 89 on my Manual.

    What? I am utterly confused on this one
    "...whether is clear to you or not, the universe is unfolding as it should"

  2. #2
    Registered User kevinsclo's Avatar
    Join Date
    Sep 2013
    Location
    Toronto, Canada
    Posts
    132
    Anti-Knock Index (AKI) or (R+M)/2Edit
    In most countries, including Australia, New Zealand and all of those in Europe,[citation needed] the "headline" octane rating shown on the pump is the RON, but in Canada, the United States, Brazil, and some other countries, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI), and often written on pumps as (R+M)/2. It may also sometimes be called the Posted Octane Number (PON).

  3. #3
    Registered User marcopolo's Avatar
    Join Date
    Feb 2005
    Location
    Alexandria Virginia/Ottawa, Canada
    Posts
    1,010
    Your bike should be the same as my 2015 GSA, insofar as recommended fuel grade, and it is indeed 89 for the wetheads. For the adventurous types, riding around the world etc., they can have their bikes re-programmed by the dealer to run on 87.
    Mark
    2015 R 1200 GS Adventure

  4. #4
    Registered User RIDERR1150GSADV's Avatar
    Join Date
    Apr 2017
    Location
    S.Florida
    Posts
    1,612
    Unless you're redlining your bike, you can run 87 and the bike will run fine. There is a whole debate on ADVrider about this too.
    I suggest you fill the bike with what makes you happy but personally I have never had an issue with any bike running 87 but I am also not dogging the engine.
    Also I do get non-ethanol gas from time to time to flush the fuel system from the corn syrup.. YMMV
    MOA # 108516
    Current ride 2018 R1200 GSA Triple Black
    Past rides '04 R1150RT, '05 K1200LT, '06 R1150GSA, ‘17 R1200RT

  5. #5
    Registered User alegerlotz's Avatar
    Join Date
    Mar 2015
    Location
    Greater Los Angeles
    Posts
    382
    Quote Originally Posted by RIDERR1150GSADV View Post
    Unless you're redlining your bike, you can run 87 and the bike will run fine. There is a whole debate on ADVrider about this too.
    I suggest you fill the bike with what makes you happy but personally I have never had an issue with any bike running 87 but I am also not dogging the engine.
    Also I do get non-ethanol gas from time to time to flush the fuel system from the corn syrup.. YMMV
    Redlining the bike wouldn't be as much of a problem as lugging the engine and/or placing a high load on the engine at low RPM.. IMO these are the situations where detonation and damage are most likely to occur.
    Current: 2021 R NineT, 2016 R1200RT
    Past: 2005 R1200RT (2/2015 - 12/2016), 1987 K100RS (12/2015 - 12/2016), 2007 KTM 450 XC-W (10/17 - 5/18), 1985 Yamaha XJ 700 Maxim (7/1989 - 9/1991)

  6. #6
    Registered User RIDERR1150GSADV's Avatar
    Join Date
    Apr 2017
    Location
    S.Florida
    Posts
    1,612
    Quote Originally Posted by alegerlotz View Post
    Redlining the bike wouldn't be as much of a problem as lugging the engine and/or placing a high load on the engine at low RPM.. IMO these are the situations where detonation and damage are most likely to occur.
    Yes lugging the engine is another bad one for pre detonation...
    MOA # 108516
    Current ride 2018 R1200 GSA Triple Black
    Past rides '04 R1150RT, '05 K1200LT, '06 R1150GSA, ‘17 R1200RT

  7. #7
    Insatiable Cruiser rtwiz's Avatar
    Join Date
    Mar 2011
    Location
    Chicago Suburbs
    Posts
    106
    My manual says 87 Octane. That's mid-grade around here. I've always used premium...this is my 4th RT. LC engines are different. I tried a tank if mid-grade in it. No difference in performance or sound that I can detect. Haven't checked mpg, but I imagine its very close to the same.

    Only reason to use regular and get the re-programming is if you're going to places where regular is the only choice...for a long time.

    Knock sensors will keep the engine from destroying itself...but you don't want to run that way for long.

    Mexican gasoline is murder on fuel injection. Use a fuel injection cleaner in every other tank if you go down there.

    2017 R1200RT; Carbon Black; all the goodies...no mods yet!
    -2005 R1200RT; Black repaint; Wilbers adj. susp; Bar-baks; Sargent seats; 94K 6/2018.
    -2000 Aprilia RSV Mille R; 20K 6/2018

  8. #8
    Knight-Errant 1957mpd's Avatar
    Join Date
    Feb 2018
    Location
    Las Cruces,NM
    Posts
    225
    There is NO knock sensor on a wethead motor.

    This I did not know. Pretty amazing given octane sensing technology has been around an awfully long time on cars, but then so has variable valve timing, which some believe the mothership is going to introduce to the wethead boxer one day. Do we need it? I dunno'. I suspect Euro rules re: emissions and mpg will be the driving force, here.
    "Soló el que ensaya lo absurdo es capaz de conquistar lo imposible." Miguel de Unamuno 1905

    Mark - Las Cruces, NM

  9. #9
    I am sticking with 89.
    "...whether is clear to you or not, the universe is unfolding as it should"

  10. #10
    BMW MOA co-founder bmwdean's Avatar
    Join Date
    Mar 2003
    Location
    Tucson, AZ, & Madison, WI
    Posts
    1,423
    I use premium.
    Jeff Dean
    Tucson, Arizona, and Madison, Wisconsin
    Co-founder, 1972, of BMW MOA -- http://bmwdean.com/r1200rtw.htm
    2017 R1200RT, 2019 R1250RT, 1967 R60/2

  11. #11
    Debbie's Servant Lee's Avatar
    Join Date
    May 2003
    Location
    SW Iowa
    Posts
    9,226
    Quote Originally Posted by LFarling View Post
    Interesting in Iowa there was a tremendous amount of non ethanol fuel available. A lot of stations had a 89 and a 89 ethanol free. A lot had 91 ethanol free.
    In Iowa 87 and 91 AKI ethanol free is common, but 89 almost always has ethanol in it.
    When I fill up in Iowa I fill up with 91 ethanol free because I don't like the bikes sitting for long periods with ethanol in the tank.
    We don't ride much locally so it's not unusual for the bikes to sit for a month in between rides and 5 months during winter.
    In our area 87 ethanol free costs 30 cents more than 87 E10, and 91 ethanol free costs 60 cents more than 87 E10.

    On trips unless the pump is clearly marked ethanol free, we use 89.
    Lee
    2022 R1250RS
    MOA # 30878
    Past BMW Bikes: 2016 R1200RS, 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  12. #12
    Registered User RIDERR1150GSADV's Avatar
    Join Date
    Apr 2017
    Location
    S.Florida
    Posts
    1,612
    Quote Originally Posted by Lee View Post
    In Iowa 87 and 91 AKI ethanol free is common, but 89 almost always has ethanol in it.
    When I fill up in Iowa I fill up with 91 ethanol free because I don't like the bikes sitting for long periods with ethanol in the tank.
    We don't ride much locally so it's not unusual for the bikes to sit for a month in between rides and 5 months during winter.
    In our area 87 ethanol free costs 30 cents more than 87 E10, and 91 ethanol free costs 60 cents more than 87 E10.

    On trips unless the pump is clearly marked ethanol free, we use 89.
    Isn't it amazing that by leaving out the corn syrup, they get to charge more....
    I make it a point to get non ethanol as much as possible, the bike, boat and car run so much better and get better fuel economy to boot.YMMV
    MOA # 108516
    Current ride 2018 R1200 GSA Triple Black
    Past rides '04 R1150RT, '05 K1200LT, '06 R1150GSA, ‘17 R1200RT

  13. #13
    Registered User AKsuited's Avatar
    Join Date
    Jul 2009
    Location
    Southern Tier of New York
    Posts
    2,219
    Quote Originally Posted by bmwdean View Post
    I use premium.
    That's what I use.

    I noticed a lot of stations in the Midwest, Casey's in particular, called 87 "Premium." I don't know how they get away with that. I only put a gallon of that stuff in the bike to make it to a BP station with a full spectrum of grades.
    My fleet: 2015 R1200GS, 2017 Toyota Prius Prime (plug-in hybrid)

  14. #14
    Registered User alegerlotz's Avatar
    Join Date
    Mar 2015
    Location
    Greater Los Angeles
    Posts
    382
    I always use the highest octane I can find because I ride the bike like I stole it.

    The incremental cost over 89 octane is minimal and next to all of the other costs (like wearing out my tires) the extra dollar a tank full or whatever is nothing.
    Current: 2021 R NineT, 2016 R1200RT
    Past: 2005 R1200RT (2/2015 - 12/2016), 1987 K100RS (12/2015 - 12/2016), 2007 KTM 450 XC-W (10/17 - 5/18), 1985 Yamaha XJ 700 Maxim (7/1989 - 9/1991)

  15. #15
    Debbie's Servant Lee's Avatar
    Join Date
    May 2003
    Location
    SW Iowa
    Posts
    9,226
    Quote Originally Posted by AKsuited View Post
    I noticed a lot of stations in the Midwest, Casey's in particular, called 87 "Premium." I don't know how they get away with that.
    Casey's calls 87 without ethanol "Unleaded" and 87 with ethanol is "Super Unleaded"

    Different companies in different parts of the country use different names for their gas.
    They can name it anything they want. Super Unleaded, Super Duper Unleaded, Premium, ect.
    When traveling in different states I never pay attention to the marketing name of the gas, I only look at the AKI name on the pump.


    Lee
    2022 R1250RS
    MOA # 30878
    Past BMW Bikes: 2016 R1200RS, 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •