What's up with the mileage??
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Hooked
2009 GTS 250ie
Joined: 24 Mar 2018
Posts: 273
Location: south Texas
Fri Jul 06, 2018 6:04 pm quote
I looked on Fuelly after getting the GTS 250ie to get an idea of what to expect for mpg. Until my last two fill-ups, I've been seeing around 74mpg pretty consistently. That seems to be a bit better than the average on Fuelly, so I'm good with that.

We have been in the Black Hills the past week - here to enjoy some cooler weather and great roads. We lived here 12 years ago, and are very familiar with the outstanding riding in this area. We have been riding pretty aggressively on fun, twisty back roads; avoiding highway riding as much as possible. I figured on/off throttle through the curves and changing elevation would have driven the mpg down. (That has been my experience with previous motorcycles.)

One fuel up ago, I got 84 miles per gallon. Yes, the tank was full. I thought that was a fluke. Fueling up today... 87 miles per gallon! A new world record (for me)!

The elevation has been between 3,500 and 5,500' for most of the riding; rarely above 50mph, but running into the corner, picking a line, and accelerating out... it has been a blast! I thought the mileage would suffer. Nope.

On that same tank, my wife got her best ever on her Honda PCX: 118 mpg (her average is around 106 mpg).

This was a low mileage bike (around 1,400 miles on it when I bought it two months ago)... maybe it is opening up? Maybe the elevation? Maybe it likes these twisties as much as I do?

Whatever the reason, I like it!
Hooked
BV250
Joined: 12 Nov 2016
Posts: 227
Location: CA
Fri Jul 06, 2018 6:18 pm quote
Is it possible that ethanol v. non-ethanol blends were in play?
Ossessionato
LX150, GTS300, BV350, EN650
Joined: 26 Jul 2017
Posts: 4379
Location: Home of the Alamo
Fri Jul 06, 2018 6:37 pm quote
Jesse_GT wrote:
Is it possible that ethanol v. non-ethanol blends were in play?
I'm curious as well. After a few fill-ups I'm supposedly getting 71 mpg on the GTS 300 and 66 mpg on the BV 350. These are both 5-10 mpg higher than the averages on Fuelly for both scoots.

I fill up at the same station each fill-up. There's a sign advertising "ethanol free" gas but it comes from a separate hose/nozzle. I always use premium, which I thought had ethanol. Might it not?

No idea, I'm just happy with the mileage. I've filled up the LX-150 but have yet to burn a full tank so have no idea what the mileage will be on it. If 5-10 mpg higher than average, it could be something with the gas.

Dunno.
Hooked
2009 GTS 250ie
Joined: 24 Mar 2018
Posts: 273
Location: south Texas
Fri Jul 06, 2018 7:27 pm quote
The gas stations around here have stickers on the pumps that say, "May contain up to 10% ethanol."

May?

At home, I run 55 to 60 mph across a 2 1/2 mile causeway on most rides, then 30 mph in town. At sea level. No option for ethanol-free there.

Here at a higher elevation, and... curves, glorious curves (hard to find in deep south coastal Texas). With that "May" in there, it could well be that the premium gas doesn't have an ethanol blend. If that were the case, I would expect better mileage. My last three fill-ups here have been at the same station... if we get back to that station, I'll have to go in and ask.
Ossessionato
LX150, GTS300, BV350, EN650
Joined: 26 Jul 2017
Posts: 4379
Location: Home of the Alamo
Fri Jul 06, 2018 7:47 pm quote
Captain Jim wrote:
The gas stations around here have stickers on the pumps that say, "May contain up to 10% ethanol."

May?

At home, I run 55 to 60 mph across a 2 1/2 mile causeway on most rides, then 30 mph in town. At sea level. No option for ethanol-free there.

Here at a higher elevation, and... curves, glorious curves (hard to find in deep south coastal Texas). With that "May" in there, it could well be that the premium gas doesn't have an ethanol blend. If that were the case, I would expect better mileage. My last three fill-ups here have been at the same station... if we get back to that station, I'll have to go in and ask.
Youíve got my curiosity up Jim; Iím going to do the same thing. Iíll be amazed if the C-Store cashier has a clue though.
Hooked
GTS 250
Joined: 08 Jun 2008
Posts: 105
Location: Cistern,Tx
Fri Jul 06, 2018 8:33 pm quote
I think it is the elevation up there. When we rode our motorcycles thru there several times over the years we always got better mpg. I remember one station we stopped at in 87 or 88 had leaded premium gas. That made the ends of them mufflers burn white. Elevation and they probably blend the gas different than around here.
Hooked
GTS 300ie Touring
Joined: 03 Jun 2018
Posts: 196
Location: Limassol, Cyprus
Fri Jul 06, 2018 11:03 pm quote
schultz wrote:
I think it is the elevation up there. When we rode our motorcycles thru there several times over the years we always got better mpg. I remember one station we stopped at in 87 or 88 had leaded premium gas. That made the ends of them mufflers burn white. Elevation and they probably blend the gas different than around here.
This seems to fly in the face of perceived logic. The higher the altitude, air becomes thinner resulting in less oxygen for fuel combustion. Also, engine performance decreases with the reduced air pressure at higher altitudes.

Drag is a big factor on fuel consumption. Naturally the Vespa is a aerodynamic piece of beauty!, but I suggest if the rider is sat in an aerodynamic position ocoupled with the the optimum size/type of windshield for reduced drag (especially on the descents), this would more than compensate for the reduced oxygen and air pressure at higher altitudes providing an increased mpg.
Ossessionato
2018 Yamaha Xmax, 2006 Vespa GT (Rocket): 2005 Vespa GT (Razzo): 2007 Vespa GT (Vanessa): 1965 Lambretta Li 125
Joined: 26 Sep 2006
Posts: 3826
Location: Jacksonville, Florida
Sat Jul 07, 2018 2:40 am quote
I ride to the North Carolina mountains with the scooter club or to meet others around once a year.

There, we take group rides.

On these rides, I always get better mileage than at home.

One time getting three tank fulls in the mid 80ís where I usually average high 60ís to low 70ís.

I think part of it is altitude, but also lower than usual speeds and little traffic.

Bill
Ossessionato
2016 GTS 300 Super - red, of course.
Joined: 27 Oct 2009
Posts: 4754
Location: Hertford, North Carolina
Sat Jul 07, 2018 5:09 am quote
Looking back at my very detailed records I can tell when I was on a rally ride because the mileage is higher. Yes, it is all in the speed; cruising at 45 - 55 gives me much better mpg than my usual 55 - 70.
Ossessionato
MP3 500, GTS 250 (both 2008 MY), 2010 Can Am Spyder RT-S, 2012 Honda NC700 DCT
Joined: 02 Mar 2013
Posts: 4764
Location: Madison, Wisconsin
Sat Jul 07, 2018 6:29 am quote
WLeuthold wrote:
I ride to the North Carolina mountains with the scooter club or to meet others around once a year.

There, we take group rides.

On these rides, I always get better mileage than at home.

One time getting three tank fulls in the mid 80ís where I usually average high 60ís to low 70ís.

I think part of it is altitude, but also lower than usual speeds and little traffic.

Bill
+1.

Low speeds (say, 50 ish MPH), and I'll add, not only little traffic but no stop signs.
Molto Verboso
2009 GTS 250, 2013 Buddy 125, 2014 Triumph Bonneville
Joined: 23 Apr 2016
Posts: 1310
Location: North Jersey
Sat Jul 07, 2018 6:36 am quote
It is the lower speeds that gives you better mileage, not the fuel brand, nor the elevation. As stated, higher elevation in itself would give you worse mileage.
Ossessionato
LX150, GTS300, BV350, EN650
Joined: 26 Jul 2017
Posts: 4379
Location: Home of the Alamo
Sat Jul 07, 2018 6:42 am quote
Vintage1 wrote:
It is the lower speeds that gives you better mileage, not the fuel brand, nor the elevation. As stated, higher elevation in itself would give you worse mileage.
Proving true for me as well. My best GTS 300 tank (so far) was during the group ride I attended two weeks ago. Did about 80 slower miles as a group and about 60 miles getting there and back at 50-60 mph. 71 mpg.
Ossessionato
LX150, GTS300, BV350, EN650
Joined: 26 Jul 2017
Posts: 4379
Location: Home of the Alamo
Thu Dec 06, 2018 12:25 pm quote
And just for comparison, I thought I'd list actual gas mileage for the tribe. YMMV.

2007 LX 150 - 77 mpg

2016 GTS 300 - 71 mpg

2017 BV 250 - 66 mpg

2015 Vulcan S 650 - 52 mpg


The scoots all get 83 octane. The Kawaski drinks 87. Pretty happy with the results.
Ossessionato
LX150, GTS300, BV350, EN650
Joined: 26 Jul 2017
Posts: 4379
Location: Home of the Alamo
Thu Dec 06, 2018 12:36 pm quote
Harbinger - What mpg are you getting on the BMW?

Curious how it compares to the Vulcan S.
Hooked
2009 GTS 250ie
Joined: 24 Mar 2018
Posts: 273
Location: south Texas
Thu Dec 06, 2018 7:57 pm quote
I am a non-current pilot (commercial/multi-engine/instrument). Jet Peddler may be able to confirm this , but we flew at higher altitudes because the fuel burn is better at elevation (with an engine properly leaned for the elevation).

I agree that the engine (aircraft or scooter) will produce less horsepower at a higher elevation, but it also means a lower octane can be used (the reason Colorado has 85 octane unleaded regular, and coastal Texas has 87 as the lowest).

We were able to find non-ethanol this summer in the Black Hills, but that is rare here in the Tropical Tip. That may account for a 10% difference in mileage.

We are considering a return to the Black Hills this next summer, because the riding is just so darn good. And, look at all the money we'll save due to that increased MPG.


link: https://itstillruns.com/effect-elevation-gas-mileage-6744997.html
Ossessionato
LX150, GTS300, BV350, EN650
Joined: 26 Jul 2017
Posts: 4379
Location: Home of the Alamo
Thu Dec 06, 2018 8:05 pm quote
Captain Jim wrote:
I am a non-current pilot (commercial/multi-engine/instrument). Jet Peddler may be able to confirm this , but we flew at higher altitudes because the fuel burn is better at elevation (with an engine properly leaned for the elevation).
Roger that.

The fuel burn can be easily half at 370 to 430 versus sea level.
Sponsor
Granturismo 218
Joined: 04 Feb 2013
Posts: 4750
Location: South Carolina
Fri Dec 07, 2018 1:29 pm quote
Captain Jim wrote:
We are considering a return to the Black Hills this next summer, because the riding is just so darn good. And, look at all the money we'll save due to that increased MPG.


link: https://itstillruns.com/effect-elevation-gas-mileage-6744997.html
You'd save even more if she rode you around on the back of her scooter...
Hooked
2009 GTS 250ie
Joined: 24 Mar 2018
Posts: 273
Location: south Texas
Fri Dec 07, 2018 5:44 pm quote
Motovista wrote:
Captain Jim wrote:
We are considering a return to the Black Hills this next summer, because the riding is just so darn good. And, look at all the money we'll save due to that increased MPG.


link: https://itstillruns.com/effect-elevation-gas-mileage-6744997.html
You'd save even more if she rode you around on the back of her scooter...
Too much distraction.
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