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Thread: Gas mileage survey

  1. #31
    Registered Schmoozer irish's Avatar
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    2002 RT. Normally I get 42-44 mpg in all conditions. High of 48 on my second tank of gas since buying the bike going 85 mph though Georgia. I think I may have miscalculated that one. My low was last Tuesday, 38 mpg from Madison to Milwaukee, temp 42 F and rain. Between the water and the cold, the only time my temp guage got above 2-3 bars was when I got stuck in Milwaukee gridlock. Never had this happen before, not even with temps in the teens.
    14 R1200GS, 02 R1150RT (retired)

  2. #32
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    OK The results are in!

    r1100/1150rt,rs riders that have weighed in;


    MPG 35 14%

    38-42 21%

    42-45 36%

    45-50 18%

    57 1%

    I am in the 14% group with mid to upper 30. I would rather be in the 36% group with 42-45.

    Wheel bearings? My riding style is conservative around town, 75-80 on freeway.

    '87 K75S sold 94578 vin150106
    '80 1980 R65 Bronco brown sold
    '99 R1100rt Opal Blue sold
    '17 1200RTW Alpine White

  3. #33
    Cannonball Rider #52 darrylri's Avatar
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    Quote Originally Posted by brhartw View Post
    I am in the 14% group with mid to upper 30. I would rather be in the 36% group with 42-45.

    Wheel bearings? My riding style is conservative around town, 75-80 on freeway.

    Do you generally make a lot of short trips, or do you generally go more than 20 miles when you fire it up?

    Do you tend to leave it on the choke for a long time?

    Have you had your air cleaner replaced at all recently? Did you change the CCP or run the system in "open loop" mode?
    --Darryl Richman, forum liaison
    http://darryl.crafty-fox.com

  4. #34
    RK Ryder
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    On Sunday I travelled 375 miles on my '98 R1100RT with oversized touring lids sticking out into the wind-stream, with all but the final 75 miles at interstate speeds of 70 - 75+ mph and averaged 41.63 Am mpg.

    Yesterday I went for a 60 mile ride on back roads on my K which has a computer with one function that monitors consumption. I made a concentrated effort to obtaining the best fuel mileage possible, making frequent references to my computer's gas assessment. It is amazing how a more deliberate and slow but steady throttle input really reduces fuel consumption. Of course, it is not as much fun, and really not as safely doable on busier highways. Frequent acceleration from stops really is a major gas eater as compared to cruising at a constant highway speed.
    Paul F. Ruffell
    Retired and riding my RTs, the '87 K100 & the '98 R1100 !
    Niagara Riders & Knights of the Roundel #333

  5. #35
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    Quote Originally Posted by DarrylRi View Post
    Do you generally make a lot of short trips, or do you generally go more than 20 miles when you fire it up?

    Do you tend to leave it on the choke for a long time?

    Have you had your air cleaner replaced at all recently? Did you change the CCP or run the system in "open loop" mode?
    Air filter was changed about 9k miles ago. All Arizona driving so maybe dusty/dirty. I'll check/replace that. My trips are generally 25 mile commutes with lots of start and stop on city streets. That will eat gas mileage. My ride home from AZ. was 75mph on freeway for 500 miles or so. There I got 44mpg.

    How about the carbon issue in the throttle bodies? Is that something that should be addressed regularly? Or does a good run down the freeway at 75 clean it out?

    Thanks for all input.

    '87 K75S sold 94578 vin150106
    '80 1980 R65 Bronco brown sold
    '99 R1100rt Opal Blue sold
    '17 1200RTW Alpine White

  6. #36
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    Quote Originally Posted by DarrylRi View Post
    Do you generally make a lot of short trips, or do you generally go more than 20 miles when you fire it up?

    Do you tend to leave it on the choke for a long time?

    Have you had your air cleaner replaced at all recently? Did you change the CCP or run the system in "open loop" mode?
    No, do not leave the choke on for more than a mile or so.
    Open loop? Not sure what that is.
    CCP as far as I know has not been addressed.

    Bike runs very smooth with minimal "surging" if any at all.
    '87 K75S sold 94578 vin150106
    '80 1980 R65 Bronco brown sold
    '99 R1100rt Opal Blue sold
    '17 1200RTW Alpine White

  7. #37
    19122
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    gas milage

    my 1997 R1100RT gets 40 MPG with 65 mph as a regular speed on the open road
    now, my question is ( dont throw stones ! ) what brand of gas are you using and what octane? a BMW dealer in N Carolina told me to run mid-grade normally and run super when loaded down and/or in the mountains comments?

  8. #38
    Cannonball Rider #52 darrylri's Avatar
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    Follow the recommendation in the book. Most of the BMW twins want premium, but my R1150RS said that mid grade was ok.

    In tall mountains like the Rockies, you find that all the grades are down a couple points, but I have never had a problem with this.

    Also, you should know that our octane numbers here are about 5 points lower for the same octane rating as the ones in Europe (read, Germany). That's because we see the average of the "Research" and "Motor" testing methods -- and that's why you see "R + M / 2" stickers on the pumps -- while Europe reports just the Research number. BMW sometimes calls the number the AKI, anti-knock index, but it's the same thing.
    --Darryl Richman, forum liaison
    http://darryl.crafty-fox.com

  9. #39
    Seattle-area Rounder OfficerImpersonator's Avatar
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    I recently pulled my CCP and removed the cannister and associated tubing to address the surge, and I am observing zero change in mileage. I also killed the surge
    Seattle, WA
    2012 R1200GSA
    2002 R1150RT-P
    1992 K75S sold

  10. #40
    While not a RT but a "C" I dropped the octane down to 87 and my mileage increased.
    I have a mixed commute of 110 rt daily. Half is 35-50 and the remainder 70+MPH.
    I get on avg. 42-45... My best was 66 mpg when I kept it under 60.
    Yes, it's a cruiser not an RT.

    I'm chiming in because octane can and will have an effect.
    I've been running 87 for four years now w/ no ill effect.

    Try it.
    Do about three tanks for the system to adjust.

  11. #41
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    Quote Originally Posted by GrafikFeat View Post
    While not a RT but a "C" I dropped the octane down to 87 and my mileage increased.
    I have a mixed commute of 110 rt daily. Half is 35-50 and the remainder 70+MPH.
    I get on avg. 42-45... My best was 66 mpg when I kept it under 60.
    Yes, it's a cruiser not an RT.

    I'm chiming in because octane can and will have an effect.
    I've been running 87 for four years now w/ no ill effect.

    Try it.
    Do about three tanks for the system to adjust.
    Wow, interesting. A tag under the seat suggests octane of 95. That must be European numbers cause we don't have that here unless you buy avgas. So at Shell I buy 91, or super, thinking thats what I need. Midgrade is 89 and low is 87.

    I did change my plugs to Autolite. Lots of folks state the bike runs smoother with them. Any chance Autolites give poor fuel econ? The bike sounds and runs great. I can't imagine spark plugs can make that much difference? The Bosch plugs are twin tip, Autolites single.

    I'll try the 87 for a few tanks and 89 for a few. 91 is too expensive anyway.
    '87 K75S sold 94578 vin150106
    '80 1980 R65 Bronco brown sold
    '99 R1100rt Opal Blue sold
    '17 1200RTW Alpine White

  12. #42
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    Quote Originally Posted by 19122 View Post
    my 1997 R1100RT gets 40 MPG with 65 mph as a regular speed on the open road
    now, my question is ( dont throw stones ! ) what brand of gas are you using and what octane? a BMW dealer in N Carolina told me to run mid-grade normally and run super when loaded down and/or in the mountains comments?
    Shell 91 sometimes Chevron 91. I'll try 89 see if there is difference.
    '87 K75S sold 94578 vin150106
    '80 1980 R65 Bronco brown sold
    '99 R1100rt Opal Blue sold
    '17 1200RTW Alpine White

  13. #43
    RK Ryder
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    I try to use Shell premium whenever there's a Shell station available. Here in Canada, they claim that they have 0% ethanol in the V Power gas.
    Paul F. Ruffell
    Retired and riding my RTs, the '87 K100 & the '98 R1100 !
    Niagara Riders & Knights of the Roundel #333

  14. #44
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    Speaking of gas mileage...
    How do the bars on the fuel gauge correlate with the amount of fuel left?
    At how many bars does one start thinking about refueling? 1996 R1100rt.
    How do you know when you are on reserve? ( 270km showing 2 bars)
    Thanks
    Louie..._/)....

  15. #45
    Prefers to play martinph's Avatar
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    Quote Originally Posted by LouieSkretas View Post
    Speaking of gas mileage...
    How do the bars on the fuel gauge correlate with the amount of fuel left?
    At how many bars does one start thinking about refueling? 1996 R1100rt.
    How do you know when you are on reserve? ( 270km showing 2 bars)
    Thanks
    I can go 112 Kms after the gauge runs out and 90 Kms after the low gas light comes on.
    400 Kms and I am dry
    Last edited by martinPH; 05-19-2010 at 02:21 PM. Reason: Change
    Martin. BMW MOA Ambassador.17748
    BMW MOA Charter, Life member.
    Valley BMW Riders. British Columbia.

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