BMW R1200R R1150R/T F800 K1200R R1100R/T R1250R RnineT Message Board

I am new to the board but I have one of the first Rocksters (#103); it was love at first sight (kind of like my former Triumph Speedtriple lust). Any ways, I have 6600 miles on my baby and have loved every moment of it.

The only thing that confuses me is the disparity in the MPG.

1. Putting around town (not being aggressive on the throttle) I get 35-38 MPG.
2. 70 MPH steady on the freeway nets me 40+
3. 90-100 MPH cruising nets me close to 50 MPG

I thought the efficiency was supposed to go down at those speeds (esp the way the thing is geared). Any thoughts or explainations?

Thank you.

I can't make any wise comments on the disparity on your mileage, but you should be happy it's so good. Putting around the city I get around 25mpg lugging my 255lb, 6'4" carcass around... I don't do enough freeway riding to have any statistics on that... I just passed 12000 miles on my Rock. Time for a service visit... Oy vey... I have an Ed.80, too. #698. Love it!
t.

I'm A new owner as well with only 255 mi. on my Ed.80 and It sounds to me like we just need to go faster to get good gas mileage !

Anonymous wrote:I am new to the board but I have one of the first Rocksters (#103); it was love at first sight (kind of like my former Triumph Speedtriple lust). Any ways, I have 6600 miles on my baby and have loved every moment of it.

The only thing that confuses me is the disparity in the MPG. . .

Hmmm, it seems to me like you're abusing this fine bike. (You're talking about one of the magnificent ghostly white ones, right?) You've ONLY got 6600 miles on it? How could you leave that fine machine pining away in your garage (obviously) when there are roads to be ridden!! Oh, the horror!

P

Mr. Guest.....I'm in no position ti discount your observations, however, speed and drag considerations seem to indicate the opposite of your observation on item #3.

If you gey 40+ MPG at 70 MPH it is improbable to explain how can mileage can increase when the engine is running faster, therefore ingesting more gas and also working against the air drag at the higher speeds which is also greater than theat at 70 MPH.

I'm beside myself....what can I say.....

I agree with Lion_Lady... ONLY 6600 miles?! I'm embarrassed putting only 10,000/year on mine!

Possible explanation for the mpg: you're catching tailwind on a slight downhill incline. It really wasn't your throttle wrist doin' all the work... it was all in your head.

I do mixed riding, but never seem to get less than 35mpg (averaging closer to 40mph).

Anonymous wrote:I agree with Lion_Lady... ONLY 6600 miles?! I'm embarrassed putting only 10,000/year on mine!

Possible explanation for the mpg: you're catching tailwind on a slight downhill incline. It really wasn't your throttle wrist doin' all the work... it was all in your head.

I do mixed riding, but never seem to get less than 35mpg (averaging closer to 40mph).

I know it's embarrassing to see a R BMW with anything less than 30,000 miles on it! Like many of you, time is not on my side....that and also the fact that I live in Houston. Houston is a land of brain dead soccer moms driving SUV's size of a small house and Bubba's driving F350 Dualies doing 90MPH. I try to avoid riding in Houston weekday traffic at all cost. I also try to avoid night rides. The only time I really put mileage on is when a group of my friends all converge on my friends lakehouse in Austin. Most of them trailer their bikes up there (booo!). I am the only one riding my bike. As for the MPG, I am still scratch my head...in the city the gas light comes on at 120 miles and on the freeway at insane speeds I got past 170 miles before the light came on...

I can't imagine getting 50 MPH while cruising at 90-100 MPH. When I first got the bike, cruising at around 70-MPH, I get probably around 43-MPG. Later on, when I got a bit more throttle happy, cruising at around 80 MPH-90 MPH, the gas dropped down to around 40-MPG. Nowadays, after installing the Power Commander and tuned the bike to run a bit richer, I'm averaging 35-MPG for cruising at around 80-90MPH.

boxermania, he forgot to mention that at 90mph, it was downhill, with the trade winds at his back.


I too, get high 30s around town with mid-lower 40s on normal expressway jaunts.

I think that sucks, but it's better than most cars. (not my prius!)

I get about 38 MPG city and close to 50 highway (varying 75-100 mph).
I do have a windscreen and I think that helps lower the drag.

mixed riding gets me 38mpg or so.....
and without screen on the rockster I believe highway speeds mean thirst....about 32mpg. Plus MY NECK AAAAHHHHHH

Still, I do 90mph with a big grin on my mush

I have something interesting to share on this topic. This happened at last years West Coast Beakster Bash in Torrey Utah. Socal Rob, Deano and I went on a high speed burner halfway around lake Powell. We started off with full tanks and spent most of the day at 100+ mph. I believe I topped out at 124 while trying to keep up with Deano. Needless to say, there wasn't much traffic around there. You could go 30-45 minutes without seeing a single car. I was really worried when my trip meter hit 220 miles and the low fuel light still hadn't lit up. When we re-fueled after taking the ferry across the lake I was astonished to find out that I had averaged somewhere around 55 mpg! I only needed about 3.8 gallons. Socal Rob can confirm this. I believe he was recording how much fuel he was usingas well. But the bottom line is THESE ENGINES WERE MADE TO RUN LIKE HELL!!!

Dan

You definitely get better milage at higher altitudes; less oxygen in the air means less fuel gets injected per intake cycle... Across a high plateau in Utah, I got 55 MPG between (and FAR between) fuel stops. I was only going 80 indicated, though. At sea level, and the same speed, I get 45-49 or so.

7

Yep, got better mileage (though we do it in KM down here) on a snowy run last year (90-100mph all day at altitude).

...and to reply to an earlier comment on the post, just clicked up 30,000km in 8 months on my Ed80. She's just run in (finally stopped slurping oil).

554

I'm getting 38/39mpg (imperial) and the last tank was 98RON because I'm a dopey twat who should be able to see the difference between car and bike

4

yellowjacket wrote:That's about 46mpg in US gallons. I hope mine gets better with more miles as it only has about 3,000 now.

no, your "gallon" is smaller - it's around 32.5mpg in your money

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