Results 1 to 12 of 12

Thread: 2017 R1200RT reduced fuel economy

  1. #1
    Registered User nyfty's Avatar
    Join Date
    Jan 2006
    Location
    Lincoln, Nebraska USA
    Posts
    191

    2017 R1200RT reduced fuel economy

    I track fuel economy on every tank of fuel that goes through my 2017 R1200RT. While it's never met the standards that BMW claims, I usually average between 42 - 45 mpg riding long interstate distances here in the great plains. Just last week my average fell to 35 - 38 mpg. I know this isn't a closed course test. But the loading of the cycle with a solo rider is the same. Also scheduled maintenance is up to date. When I returned home I scanned for error codes using my GS911. Only one was present, Tank Switch Error. Can someone explain what this code means? I have attached a screen shot of the results.Fault Code.jpg
    Jim Nyffeler (Nyfty)
    2017 R1200RTW, 2018 G310GS
    BMWMOA 110521, IBA 8936
    Knights of the Roundel #333

  2. #2
    Registered User zenwhipper's Avatar
    Join Date
    Apr 2016
    Location
    Seattle, WA
    Posts
    120
    What riding mode are you riding in? DYNA will use more fuel.
    “I do not fear death. I had been dead for billions and billions of years before I was born, and had not suffered the slightest inconvenience from it.”- Mark Twain
    Past bikes: 2001 Kawa ZR750S, 2002 VFR, 2006 V-Strom, 2008 FJR

  3. #3
    MOA #24991 Pauls1150's Avatar
    Join Date
    Apr 2008
    Location
    south of Los Angeles
    Posts
    3,527
    The only "tank switch" I can think of would be an interlock or sensor on the tank's gas cap - is that closing properly and securely? If it isn't, maybe ordinary evaporation and/or airflow is wasting your gas, or a faulty switch?

  4. #4
    That "Tank Switch Error" along with Sirius XM Antenna Open and a couple of transitory nuisance codes are just that...clear them unless you really are not getting the radio to work or you think there is a significant problem with your gas tank latching mechanism.

    One off's are not something to get concerned about and can be the result of many, many different factors...none of which can be diagnosed or troubleshot thru any forum or board.

    This is very similar to any effort you have to go on a diet and loose weight....don't get on the scales every day to see how you are doing.

    Sorry, this is not a solution, but the philosophy of ownership is up to every individual and trying to solicit advice on a forum is too much like getting on social media to post your daily coffee selection.

    During the accumulation of mileage getting close to scheduled maintenance is always a time to access whether you could enjoy some better performance/ride satisfaction by doing the service early.

    Replacing the plugs alone could be the solution to this issue, but like they say, everyone has an opinion.

  5. #5
    Registered User lkraus's Avatar
    Join Date
    Nov 2011
    Location
    Central Ohio
    Posts
    2,076
    Gas stations are switching to winter blend gas, but that alone would usually only account for about a 1.5-2.0% drop in mileage.
    Larry
    2006 R1200RT

  6. #6
    Debbie's Servant Lee's Avatar
    Join Date
    May 2003
    Location
    SW Iowa
    Posts
    9,840
    Quote Originally Posted by nyfty View Post
    . Just last week my average fell to 35 - 38 mpg. ]
    Was this one tank or several tanks?
    Lee
    2022 R1250RS
    MOA # 30878
    Past BMW Bikes: 2016 R1200RS, 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  7. #7
    Registered User RIDERR1150GSADV's Avatar
    Join Date
    Apr 2017
    Location
    S.Florida
    Posts
    1,862
    Quote Originally Posted by Lee View Post
    Was this one tank or several tanks?
    Good question as I suspect too much ethanol in the gas.....
    I'd try a tank or two non-ethanol and go from there. I have similar milage issues with ethanol in my 2018 GSA...YMMV
    MOA # 108516
    Current ride 2018 R1200 GSA Triple Black
    Past rides '04 R1150RT, '05 K1200LT, '06 R1150GSA, ‘17 R1200RT

  8. #8
    Registered User nyfty's Avatar
    Join Date
    Jan 2006
    Location
    Lincoln, Nebraska USA
    Posts
    191
    Quote Originally Posted by zenwhipper View Post
    What riding mode are you riding in? DYNA will use more fuel.
    Riding in NORM mode
    Jim Nyffeler (Nyfty)
    2017 R1200RTW, 2018 G310GS
    BMWMOA 110521, IBA 8936
    Knights of the Roundel #333

  9. #9
    Registered User nyfty's Avatar
    Join Date
    Jan 2006
    Location
    Lincoln, Nebraska USA
    Posts
    191
    Quote Originally Posted by Lee View Post
    Was this one tank or several tanks?
    Five fill ups over two days. Traveling in Iowa mostly at Iowa’s interstate speed limit. With about 60 miles of Iowa two lane at 55 mph.
    Jim Nyffeler (Nyfty)
    2017 R1200RTW, 2018 G310GS
    BMWMOA 110521, IBA 8936
    Knights of the Roundel #333

  10. #10
    Debbie's Servant Lee's Avatar
    Join Date
    May 2003
    Location
    SW Iowa
    Posts
    9,840
    Quote Originally Posted by nyfty View Post
    Five fill ups over two days. Traveling in Iowa mostly at Iowa’s interstate speed limit. With about 60 miles of Iowa two lane at 55 mph.
    That rules out a bad batch of gas or accidentally getting E85.
    Three different times we got some weird gas and both bikes dropped their gas mileage by 8 to 10 mpg.
    No change in our speed, the wind speed or wind direction. Next tank-full our mileage went back up.

    With five fill ups over two days something is up.
    Lee
    2022 R1250RS
    MOA # 30878
    Past BMW Bikes: 2016 R1200RS, 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  11. #11
    Did you recently disconnect the battery or have it go dead?

  12. #12
    Registered User RIDERR1150GSADV's Avatar
    Join Date
    Apr 2017
    Location
    S.Florida
    Posts
    1,862
    That leaves valve settings, air filter and spark plugs.... My 0.02 Cts.
    MOA # 108516
    Current ride 2018 R1200 GSA Triple Black
    Past rides '04 R1150RT, '05 K1200LT, '06 R1150GSA, ‘17 R1200RT

Similar Threads

  1. Reduced Fuel Economy
    By rummy63 in forum Wedge K-bikes
    Replies: 5
    Last Post: 04-10-2014, 09:50 PM
  2. Post Your Airhead Fuel Economy Numbers
    By helmut_head in forum Airheads
    Replies: 45
    Last Post: 07-05-2011, 01:10 AM
  3. Fuel Economy
    By glurkus in forum Hexheads/Camheads
    Replies: 8
    Last Post: 10-23-2008, 08:26 AM
  4. R bike, performance to fuel economy?
    By saber in forum Oilheads
    Replies: 15
    Last Post: 03-08-2008, 01:23 PM
  5. fuel economy
    By jzeller in forum Oilheads
    Replies: 10
    Last Post: 08-13-2003, 06:25 AM

Posting Permissions

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