F800GS Gas Mileage: What Ya Gettin'?

[Nemesis]

Originally Posted by The Griz

For MPG today, my OBC was throwing numbers pretty consistent with what BMW claims. 60 mpg or so at 55 mph, and 45 mpg or so at 70 mph. However, I'm a bit concerned with the the number it was posting for "miles until fill." With a full tank of gas it was saying 134 miles until fill needed. weird. Shouldn't it say more like 210 or 220 miles? Thoughts?

Originally Posted by Calibob

Same here... When I fill up, my OBC shows a "greater than" > symbol before the projected miles to refill. I read somewhere that this is normal and the OBC won't start counting down until your below the "greater than" predicted mileage.
2100 miles and I have been averaging about 56mpg
75-80 mph highway...

If you consult you Mexican friend Manuel he will tell all (on page 41)....

[RedHawk47]

I've been getting about 45 mpg per the OBC, so I'm jealous. Mostly a 8 mile commute on country roads with few stops.

But I figured something out this weekend. I've been doing most of my riding with the OBC set on ambient temperture - because it's been cold and I wanted to know how much protection I needed for what the temperature was.

It has been warmer lately so I changed the OBC to show my current fuel comsumption. I found that if I accelerate to "X" mph my fuel usage will be "Y" mpg. But if I accelerate to "X+5" mph and then slow down to "X" my fuels usage will be "Y+10" mpg. I was testing mostly around 50 mph. Don't know how well it works at higher speeds but I expect it will still make some difference. Your thoughts are appreciated.

[sysie]

281.8km done and still 136km to go, that is 417.8km (259.6 miles) on a tank !, have to add that this was mostly doing 80 - 90km/h on gravel and the nearest fuel was far ahead..... so my primary objective was to save fuel..

This is 26km/l or 61.8 m/g

[The Griz]

Been pulling 48mpg @ 65-70mph with panniers on and fully loaded. 15-20mph winds.

[The Griz]

Originally Posted by sysie

281.8km done and still 136km to go, that is 417.8km (259.6 miles) on a tank !, have to add that this was mostly doing 80 - 90km/h on gravel and the nearest fuel was far ahead..... so my primary objective was to save fuel..

This is 26km/l or 61.8 m/g

Makes sense. Seems to be along the lines of what I'm getting at those speeds too.

[cba191]

i need to fill up tomorrow, and i'm at 220 miles with no low fuel indicator yet. this is primarily with 75mph commuting. i've noticed that with the weather warming up, my mpg is improving dramatically/

[cba191]

Originally Posted by cba191

i need to fill up tomorrow, and i'm at 220 miles with no low fuel indicator yet. this is primarily with 75mph commuting. i've noticed that with the weather warming up, my mpg is improving dramatically/

whoops. another victim of the lacking accuracy of the fuel gauge. filled up this morning and she took just over 4 gallons.

[The Griz]

I have 148 miles on my current tank of gas. The OBC tells me I have 52 miles until I need to fill. So I'm assuming the fuel light will come on in 20 miles or so. I'm getting kind of sketched out with this fuel level sensor consistency. How am I getting this bad gas mileage? Shouldn't I be pulling at least 200 miles before the fuel light comes on? I'm still in the break-in process. I've got 400 miles on the bike.

[neilsmiff]

Originally Posted by dwayne

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.

I'm a XTZ750 rider looking at the GS at the mo'. Browsing through the BM brochure (the UK one at least) it says there's a factory option to get it mapped to run on 'low octane' gas. Can't remember the figures or the rating method, sorry.

Not much help if you've already got one I s'pose but it may mean the remaps an easy one to get done by the dealer.

Interestingly what's the story if you get a 'low octane' mapped bike and then run normal gas - say 95 RON (UK)???? any ideas....?

Neil Smiff
___________________
too many to remember:
Cagiva E900
Honda RT03
Kawasaki KLR650
Kawasaki KDX200
Lots of Italian stuff.

[Bayner]

1600 kms so far, rider is 5'10 @ 170lbs
no luggage, stock bike
Daily commute 90-100 kph = avg 4.7L per 100 kms
Agressive riding, offroad and speeds over 100 kph = avg <6.5L per 100 kms
(as indicated by OBC and verified by manual calculation with GPS)

Incidentally, my GPS and speedo/odo are in agreement.
Overall average has been right around 5L/100kms. Overall I'm impressed, I thought it may be worse!! I'm going to watch that average drop off now that I have the knobbies on though...

[SoDak]

49mpg, 20 minute daily commute with interstate (75mph) and some city (30mph), have hard bags on at all times

[Boon Booni]

So what range are you guys typically getting before fill ups? You've listed miles to empty, but when out on a ride I never push my mileage to the last drops if I can avoid it. On my Weestrom that means filling up between 225-250 miles on a tank. That typically leaves me about half a gallon as backup. I watch my gas gauge and as the last bars drop I can tell pretty accurately how my mileage has been and how much fuel I have left.

What's your typical fill up mileage?

[Motoriley]

41 and 40 mpg (US), 5.1 and 5.8 l/100km Canadian. Lots of hills and curves.

[Oso Blanco]

-Stock gearing, exhaust, windscreen etc
-no luggage
-odo 1300km
-6'3", 240lbs
-40-43mpg for the first several fills
-52mpg on the last tank

Been filling at the same station, same grade and have been riding the same % of city and highway so I'm not sure why the last tank jumped so much (not upset about it...)

[RobStar]

Three months, 3300 miles later with 17 tooth sprocket added

---

The Variables:
Units: Miles per US gallons
Odometer: 3300 miles
Rider: 5'11" 175 lbs
Luggage: Jesse Odyssey II sides only loaded with general tools, tubes, water bottles etc..
Windscreen: Stock
Exhaust: Stock
Tires: Stock Bridgestone
Misc: Adv-Spec crash bars and bash guard
Riding Conditions: Mix of highway at 65-75 mph +/-, twisty back roads, many short trips and errands. Generally windy conditions always in Las Vegas!
Results:
In my first post after the first 500 miles I averaged only 30.3 miles per gallon.

At this point I'm averaging 49-54 mpg pretty consistently and calculated with a calculator not the OBC. No issues with the OBC mileage readings though but after running out of gas the first week I give it plenty of respect/cushion, have the fuel range set on my GPS as a reminder and now carry two MSR fuel bottles in DV and off-road.

I'm switching to TKC 80's next week so it will be interesting to see the difference for my around town stuff.

RobStar