Gas Mileage : 2 Up


Information and questions on GL1500 Goldwings (1988-2000)
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reasonator
Posts: 41
Joined: Wed May 04, 2011 3:25 pm
Location: Corydon, IN
Motorcycle: 1989 GL1500

Gas Mileage : 2 Up

Postby reasonator » Sat Sep 17, 2011 11:44 pm



Can anyone explain how an '88 GL1500 can get better gas mileage running 2UP?! I have tested and retested this phenomenon several times to find out that I'm getting 3-4 MPG more with my wife riding shotgun! I swear the number are for real...does anyone have a suggestion or explanation as to how this might be possible

My thought is, an extra 110lbs on the bike SHOULD cost in fuel economy! Is it possible that the aerodynamics are better with the back seat filled and no "open" area to cause more drag?!


"Those that dare to be can never be weak." - Unknown

Mercness
Posts: 20
Joined: Mon Aug 15, 2011 4:13 pm
Location: Arlington, TX
Motorcycle: 1986 GL1200 Interstate

Re: Gas Mileage : 2 Up

Postby Mercness » Sun Sep 18, 2011 2:09 am

I've noticed the same thing in my 1200. Just more proof on why Goldwings are the ultimate touring machine. Comfy, and fuel efficient!

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heidebill
Posts: 144
Joined: Thu Apr 01, 2010 12:54 am
Location: Onoway Alberta, Canada
Motorcycle: 1997 GL1500SE

Re: Gas Mileage : 2 Up

Postby heidebill » Sun Sep 18, 2011 6:08 am

Ahh, She is your Cruise Control and makes you ride 2 mph slower and thats where you get the milage, Ha Ha,
Bill

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Sempai
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Joined: Wed Mar 10, 2010 12:30 am
Location: Wichita, KS
Motorcycle: '94 GL1500SE
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Re: Gas Mileage : 2 Up

Postby Sempai » Sun Sep 18, 2011 8:42 am

reasonator wrote:My thought is, an extra 110lbs on the bike SHOULD cost in fuel economy! Is it possible that the aerodynamics are better with the back seat filled and no "open" area to cause more drag?!

Well, next step is to leave the wife at home, but carry 110lbs worth of dead wait, evenly dispersed in your saddlebags/trunk. Suggest 60lbs in the trunk and 25lbs in each saddlebag. I'm curious to hear the results of this experiment....
Keep the rubber side down.

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robb
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Joined: Mon Jul 19, 2010 7:46 pm
Location: Lexington, North Carolina
Motorcycle: 1989 Honda GL1500 Aspencade

Re: Gas Mileage : 2 Up

Postby robb » Sun Sep 18, 2011 9:22 pm

My 89 also does better 2 up riding, but then 200 lbs is no match for the goldwings torque. Have a 92 ford crew cab dualie with diesel that get 2-4 mpg better with a 6ooo ld load than empty. Some things just do better under load.

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dingdong
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Gas Mileage : 2 Up

Postby dingdong » Mon Sep 19, 2011 11:00 am

heidebill wrote:Ahh, She is your Cruise Control and makes you ride 2 mph slower and thats where you get the milage, Ha Ha,
Bill

That is probably your answer. All in the wrist.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

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reasonator
Posts: 41
Joined: Wed May 04, 2011 3:25 pm
Location: Corydon, IN
Motorcycle: 1989 GL1500

Re: Gas Mileage : 2 Up

Postby reasonator » Mon Sep 19, 2011 2:36 pm

Sempai wrote:Well, next step is to leave the wife at home, but carry 110lbs worth of dead wait, evenly dispersed in your saddlebags/trunk. Suggest 60lbs in the trunk and 25lbs in each saddlebag. I'm curious to hear the results of this experiment....


Sempai, I'm going to try this little experiment. Providing I get some better riding weather, I will let you know what I find out.
"Those that dare to be can never be weak." - Unknown

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Sempai
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Location: Wichita, KS
Motorcycle: '94 GL1500SE
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Re: Gas Mileage : 2 Up

Postby Sempai » Mon Sep 19, 2011 3:10 pm

reasonator wrote:Sempai, I'm going to try this little experiment. Providing I get some better riding weather, I will let you know what I find out.

EXCELLENT!!! I'm really looking forward to your results!
Keep the rubber side down.

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heidebill
Posts: 144
Joined: Thu Apr 01, 2010 12:54 am
Location: Onoway Alberta, Canada
Motorcycle: 1997 GL1500SE

Re: Gas Mileage : 2 Up

Postby heidebill » Mon Sep 19, 2011 9:16 pm

I did tests on my 1500, 120km/hr, 110km/hr, 100km/hr. A surprisingly huge difference in milage between 120/42mpg and 100/54mpg.
Have fun do the test, I enjoy trying different things out,
Many years ago I tried,(on my car) increasing tire pressure form 32psi to 45psi, also made a huge difference.
Bill

JJwinger
Posts: 16
Joined: Mon Sep 12, 2011 10:26 am
Location: Black Mountain, NC
Motorcycle: 1989 GL1500

Re: Gas Mileage : 2 Up

Postby JJwinger » Mon Sep 19, 2011 9:48 pm

or better yet, green military duffle bag strapped to the passenger seat!

JJ

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reasonator
Posts: 41
Joined: Wed May 04, 2011 3:25 pm
Location: Corydon, IN
Motorcycle: 1989 GL1500

Re: Gas Mileage : 2 Up

Postby reasonator » Mon Sep 19, 2011 10:11 pm

JJwinger wrote:or better yet, green military duffle bag strapped to the passenger seat!

JJ

JJ, we are trying to figure out if the better mileage is attributed to the aerodynamics of having someone or something in the back seat, or if it's attributed to the weight alone.


"Those that dare to be can never be weak." - Unknown


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