F800GS Gas Mileage: What Ya Gettin'?

Discussion in 'Parallel Universe' started by robhar54, Nov 22, 2008.

  1. robhar54

    robhar54 Been here awhile

    Joined:
    Jan 14, 2006
    Oddometer:
    476
    Location:
    Seattle, WA
    The Variables:
    Units: Miles per US gallons
    Odometer: ~950 miles
    Rider: 6'2" 210 lbs
    Luggage: Metal Mule 38L balanced system
    Windscreen: Stock
    Exhaust: Metal Mule aftermarket
    Riding Conditions: Mix of highway at 75mph, twisty back roads, fire trails, lots of short trips in-city commuting.

    Results:
    Overall Average from the start: ~42 mpg according to the OBC.
    A typical sport ride on local twisties, back roads and highway where I reset the OBC: 55 mpg.

    What's yours been?

    Rob in Seattle
    #1
  2. levity

    levity nano-Adventurer

    Joined:
    May 19, 2004
    Oddometer:
    1,088
    Location:
    Irvine, Calif.
    The Variables:
    Odometer: 2,050 miles (cumulative, just reset)
    Rider: 6', 170 lbs
    Luggage: none for 95%
    Windscreen: stock
    Exhaust: stock
    Riding Conditions: mostly twisty back roads, some highway at ~70+ mph, limited fire trails, almost no city commuting.

    Results:
    Overall Average from the start: 50 mpg according to the OBC.
    Range to empty: seems to be ~210-230 depending on right wrist


    :super Agrees with your results, Rob, considering skinny rider, no luggage.
    #2
  3. Karel

    Karel Been here awhile

    Joined:
    Jun 10, 2008
    Oddometer:
    115
    Location:
    Georgia
    <hr style="color: rgb(87, 87, 87);" size="1"> <!-- / icon and title --> <!-- message --> The Variables:
    Odometer: 3,250 miles
    Rider: 6', 160 lbs
    Luggage: Top case 95%
    Windscreen: stock
    Exhaust: stock
    Riding Conditions: city/highway 80%, 20% offroad.

    Results:
    89 octane gasoline average: 50mpg
    I tested the 92 octane gasoline and the average was down to 43mpg.
    #3
  4. durtrider

    durtrider adventure sow

    Joined:
    Oct 30, 2005
    Oddometer:
    676
    Location:
    Land of the Red Man
    Another variable to consider is ethenol fuel as opposed to straight 100% gas. Ethenol is cheap gas, but ruins my mpg, by as much as 20%. I'll go out of my way not to use it if I can. Sometimes you can't help but to fill up with it, but I avoid ethanol when I can.
    #4
  5. abramsgunner

    abramsgunner Adventurer

    Joined:
    Oct 14, 2006
    Oddometer:
    22
    E-10 is about all I can find in my area anymore and my Versys mpg is down about 10% over the last few tanks. :kboom
    #5
  6. BikePilot

    BikePilot Long timer

    Joined:
    Jul 5, 2005
    Oddometer:
    11,251
    Location:
    Tampa
    Also I've found average temperature and altitude can make a huge difference. I've seen variations based on either as high as 20% with my bikes (I don't have an F800 but it would likely be similarly effected).
    #6
  7. Dave92029

    Dave92029 Been here awhile

    Joined:
    Aug 22, 2003
    Oddometer:
    584
    Location:
    Escondido, CA
    I have over 1,400 miles on my F650GS and I generally average 58 mpg around town and in the mtns.

    On Sturday evening I took a 240 mile ride on the freeway and averaged 51mpg, but I had pretty strong headwinds on my return home on that trip. :eek1
    #7
  8. Lobby

    Lobby Viel Spass, Vato!

    Joined:
    Nov 30, 2003
    Oddometer:
    28,994
    Location:
    San Antonio, Tx
    How accurate are the speedometers / odometers? Traditionally, BMW meters have been waaay off.

    If you base your MPG off a faulty odo, you're gonna get a bad number.

    Anybody doing this calc with a GPS?
    #8
  9. Dave92029

    Dave92029 Been here awhile

    Joined:
    Aug 22, 2003
    Oddometer:
    584
    Location:
    Escondido, CA
    On my last ride the odo showed 233 miles vs 240 on the Garmin :freaky
    #9
  10. sgopher185

    sgopher185 Been here awhile

    Joined:
    May 10, 2006
    Oddometer:
    115
    Location:
    Plain City, Ohio
    Sheesh. You skinny bastages are getting about 5 mpg better than me :rofl

    The Variables:
    Odometer: ~ 850 miles
    Rider: 6'2", 265 lbs
    Luggage: none for 95%
    Windscreen: stock
    Exhaust: Akra w/ baffles in
    Riding Conditions: mostly twisty back roads commuting (10 miles one way).

    Results:
    Overall Average from the start: 49 mpg according to the OBC but calculated closer to 52-53 using the ODO/gas each tank.
    Range to empty: seems to be ~220-240 depending on right wrist
    #10
  11. tmex

    tmex Long timer

    Joined:
    Apr 20, 2006
    Oddometer:
    2,039
    Location:
    NorCal
    The Variables:
    Odometer: ~ 2000 miles
    Rider: 6', 200 lbs
    Luggage: none
    Windscreen: stock
    Exhaust: Akra w/ baffles out
    Riding Conditions: 70% 2nd/3rd gear fire roads - 30% twisty pavement

    Results:
    Overall Average from the start: 50 mpg using odo and pump reading. GPS measurements show odo/speedo high by about 7% so adjusting for that the mpg drops to about 47.
    #11
  12. Bayner

    Bayner Long timer

    Joined:
    Mar 27, 2008
    Oddometer:
    1,626
    Location:
    Penticton, BC
    Karel, is your bike mapped for 89 octane? Anybody in North America done this?
    #12
  13. Bucko

    Bucko In a parallel world

    Joined:
    Mar 20, 2004
    Oddometer:
    820
    Location:
    South Coast, CA
    With no bags on, I've been getting about 48mpg computed from the odo, and this is with mostly tame riding to work and back (5 miles of fwy). Was figuring on better than this...it can only go downhill when I put on a load.
    #13
  14. Ron Wardman

    Ron Wardman Beemerguy

    Joined:
    Aug 7, 2004
    Oddometer:
    249
    Location:
    South Oregon Coast
    5'-7, 165 lbs, 800GS, TT 41 liter bags, nearly all rural riding and "brisk" paces. Use GPS for mileage, worst, 54 mpg, best 64 mpg. Very consistent at 56 mpg.
    #14
  15. M N B

    M N B would rather be riding

    Joined:
    Nov 26, 2008
    Oddometer:
    1,216
    Location:
    San Jose, CA
    In a review on ridermagazine.com:

    Since you get run over around here if you're not doing 75+, I tend to do a70-75mph most of the time. Given the mileage I'm getting (46mpg), this is consistent with the quoted claims.
    #15
  16. Bucko

    Bucko In a parallel world

    Joined:
    Mar 20, 2004
    Oddometer:
    820
    Location:
    South Coast, CA
    The BMW web site now says "Estimated 54.2* mpg," with the * addressing the mileage as measured during the Federal Test Procedure for EPA exhaust certification.

    I want Wardman's bike. He's shorter and heavier than me, but gets better mileage. Maybe I should slouch a bit.:D
    #16
  17. dwayne

    dwayne Silly Adventurer

    Joined:
    Feb 7, 2006
    Oddometer:
    3,614
    Location:
    wheelie in purgatory, Calgary
    north american 89 equals about 91 europen. the diffrence is in the meaurment method. you should not need a remap. be sure to read the letters after your recommended octane number in your manual, and compare them to what is on the pump.

    Most european countries use RON, but NA averages the RON and the MON to come up with the number you see on the pump


    http://en.wikipedia.org/wiki/Octane_rating
    #17
  18. Bayner

    Bayner Long timer

    Joined:
    Mar 27, 2008
    Oddometer:
    1,626
    Location:
    Penticton, BC
    I just read the section on fuel again in the owners manual and it states recommend fuel as 95 RON. This translates to 91 (R+M)/2 which is mid grade on most Canadain pumps in my experience. (Just throwing that out there...)
    #18
  19. dwayne

    dwayne Silly Adventurer

    Joined:
    Feb 7, 2006
    Oddometer:
    3,614
    Location:
    wheelie in purgatory, Calgary

    oops made an assumtion. I assumed the number listed in the manual was a RON number, like the old 650 had. Wierd that an ADV bike is speced to run on anything other than 87/89 grade.
    #19
  20. M N B

    M N B would rather be riding

    Joined:
    Nov 26, 2008
    Oddometer:
    1,216
    Location:
    San Jose, CA
    I know, especially considering premium grade gas can be hard to find in the remote places the bike is designed to go. Not sure what BMW was thinking there...
    #20