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I'm amazed the the fuel figures I'm getting for my 2009 R12. It's averaging 56 MPG (uk) at the moment. My current tank full has taken me 240 miles and the onboard reading shows I have 45 miles to go. What did have me puzzled at the last fill up is I got 20 litres of petrol in, I thought it was an 18 litre tank. :confused:
 

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Dave,

Do not trust the "Distance Remaining" feature on the computer.
A lot of people have learned this the hard way. They often run dry and still show 30 miles left.

Always work off of your odometer and refuel at a comfortable distance. Given the bike can get as low as 35 MPG, in stop and go traffic, I always fill up at 200 miles (US) or sooner if the light comes on. Total driving range is anywhere from 200 miles to 275 miles depending on conditions.

Is your 56 MPG calculated at fill up, or what the computer is showing going down the road? I can get true 50 MPG on easy rides at 50 MPH, but normal street/freeway driving I get 43.

Scott
 

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Discussion Starter #3
I use fuelly.com to track my progress and always fill the tank up. The F800 I had a few years ago had the same onboard display and the accuracy was excellent. I'm down to one bar on the gauge but it hasn't started flashing yet so I reckon this one too must be fairly accurate as well. I'll find out tomorrow when I fill her up.
 

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I'm guessing that an aerodynamic windshield and maybe a non-porky posterior gives you better mpg. I also get high 50's low 60's on the highway with a Ztechnik screen and about 160 pounds, not counting a massive Motoport jacket.
 

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What did have me puzzled at the last fill up is I got 20 litres of petrol in, I thought it was an 18 litre tank. :confused:

Do you always charge at the same station??

Many many things to consider your Miles/kilometers per Gallon/liter.
Most of the time we calculate the odometer, computer and kind of riding done (highway, city). But rider weight, weather, temperature, throttle abuse, even if you have leather or mesh jacket will change the numbers.
And some how we trust the gas station pump's numbers.
 

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The question is where does BMW consider the tank to be full? On the 1150 the restraining bar was just below the filler tube and I could barely put in a few more tenths of a gallon, but on the 12, that bar is far lower, maybe at 18 liters? And I can coax in sometimes another gallon.
I haven't ridden her enough to see the low fuel light come on, always filling before that because I fear runnin g out of gas and many have, but doing so I am adding nearly 4 gallons to get the level just below the restraining bar.
I don't think I am over filling, though being a novice, I only know to look for fuel spillage, and see none.
But I find the tank size confusing also.
John
 

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Discussion Starter #8
Filled her up today, 257.5 miles and 20.5 litres, which is 57.1 MPG which is also what the on board reading said I'd done. The low fuel light came on at 241 miles and when I filled up the display said I had 20 miles left, but I wasn't brave enough to take it any further. Next time I may take my little jerry can with an extra 2 litres to see who far I can go!!!
 

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Dave,

Do not trust the "Distance Remaining" feature on the computer. A lot of people have learned this the hard way. They often run dry and still show 30 miles left.

Always work off of your odometer and refuel at a comfortable distance. Given the bike can get as low as 35 MPG, in stop and go traffic, I always fill up at 200 miles (US) or sooner if the light comes on. Total driving range is anywhere from 200 miles to 275 miles depending on conditions.

Is your 56 MPG calculated at fill up, or what the computer is showing going down the road? I can get true 50 MPG on easy rides at 50 MPH, but normal street/freeway driving I get 43.

Scott
+1 on that, Scott. I'm getting almost exactly the same results on my 2012 with a CalSci 21" screen and my 190 lb bulk. Since my fuel strip was replaced about 3k miles ago, the guage, low fuel light, and the miles to empty seem pretty accurate, too.

Bob
 

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Leaving a good windshield on will increase mpgs because of the improved aerodynamics. Parabellum makes a big deal about this, but I suspect that any good screen does the same.
 
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