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WooDmEn
02-28-2006, 01:42 PM
Here is the reuslts of some recent research on my 2006 R12RT, 2,500 miles.

Beginning with a full tank, the "Miles Remaining" went to zero (flat line) at 292 miles. The bike actually ran out of fuel at 327 miles, indicating that there is about 35 miles (or 0.6-0.7 gal) of USEABLE fuel remaining after "Zero." Upon fill-up (I carried a gallon can of gas with me to do this research), the tank took 5.982 gallons, and I rode 5 miles to the filling station, or about 0.1 gallons. Therefore, the USEABLE fuel load on an R12RT appears to be 6.0-6.1 gallons, NOT the 7 gal. indicated in the spec sheet for the bike. Pisser!

The MPG function showed 48mpg, whereas an actual calculation gave a value of 55mpg. Go figger!

Anyway, it appears that R12RT owners CAN rely on the "Miles Remaining" values, all the way to zero, and still have a moderate cushion. YMMV.

Wiles
WooDmEn
02-28-2006, 02:18 PM
I screwed up. The actual useable fuel IS 6.88 gallons (5.982 + 0.9gal). The actual MPG was 47.52.

Good thing I gotta wife who is math-competent!
cjack
02-28-2006, 07:06 PM
I screwed up. The actual useable fuel IS 6.88 gallons (5.982 + 0.9gal). The actual MPG was 47.52.

Good thing I gotta wife who is math-competent!

It's not math, it's reading a word problem and coming up with the problem to solve. She's good.
hawkrider
03-01-2006, 11:10 AM
Interesting results. Although I have not gone to the trouble (yet) that you did to actually run out of gas, the mileage numbers for my R12ST seem to be consistent with your results. I always have more fuel left in the tank than the bike says I should. :confused:
Why don't they (BMW) just allow the system to show actual fuel and residual mileage remaining? The way it is now, its like having a reserve after the reserve. I'd rather know exactly whats left and make my own pit stop decisions.
dancogan
03-01-2006, 12:55 PM
Why don't they (BMW) just allow the system to show actual fuel and residual mileage remaining? The way it is now, its like having a reserve after the reserve. I'd rather know exactly whats left and make my own pit stop decisions.

Ahhh, but you forget that the tendency today is to design for the lowest common denominator. So they have to look out for the guy who believes he should never, ever run out of gas, by leaving a margin of safety, knowing that smarter guys like you can always figure out what's in the tank. Isnt' that the way so many things are designed today?
jdiaz
03-01-2006, 04:33 PM
Ahhh, but you forget that the tendency today is to design for the lowest common denominator. So they have to look out for the guy who believes he should never, ever run out of gas, by leaving a margin of safety, knowing that smarter guys like you can always figure out what's in the tank. Isnt' that the way so many things are designed today?
I don't think its a big deal. If you know the mpg readout is right on, you can do the math in your head to figure out actual range.

Well, maybe Roger would have to ask Norma to do the math. :laugh
WooDmEn
03-02-2006, 10:04 AM
Interesting results. Although I have not gone to the trouble (yet) that you did to actually run out of gas, the mileage numbers for my R12ST seem to be consistent with your results. I always have more fuel left in the tank than the bike says I should. :confused:
Why don't they (BMW) just allow the system to show actual fuel and residual mileage remaining? The way it is now, its like having a reserve after the reserve. I'd rather know exactly whats left and make my own pit stop decisions.

yeah, me, too. However, I can see why a manufacturere would want o build in a little suchion into the hardwre and software. Also, it is important to have some unusable fuel in the tank to trap garbage and water at the bottom. :violin
hawkrider
03-02-2006, 02:03 PM
Ahhh, but you forget that the tendency today is to design for the lowest common denominator. So they have to look out for the guy who believes he should never, ever run out of gas, by leaving a margin of safety, knowing that smarter guys like you can always figure out what's in the tank. Isnt' that the way so many things are designed today?

Very true. No doubt someone would run out of gas, get run over by a truck while walking to the gas station :doh , and the family would sue BMW. :lol

Lou