Let's talk gas mileage (again) - Page 7 - Steve Saunders Goldwing Forums

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post #61 of 91 (permalink) Old 09-18-2015, 11:15 PM Thread Starter
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Originally Posted by Hondadiver View Post
My 01 GL1800 was getting-42-48 mpg
Last year it dropped to 32-35.. Bike ran great other than bad milage, this summer it broke down on a long trip 8 times...finally found the problem, it was an electrical bad connection for the bikes ECM system in an electrical connector, once this was fixed the milage went up to the mid 40s again
Now that is interesting. I would not have thought of that.

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post #62 of 91 (permalink) Old 09-18-2015, 11:18 PM Thread Starter
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'99 GL1500 125,000 miles. Always ride 2-up. Wife weighs 110, I weigh 220. I never go above the speed limit and rarely go over 65. My average mileage is 42. Strangely enough, I always get better mileage in the mountains - all bikes & car. My windshield is stock cut down about 4 inches so I can easily see over it.
That sounds about right Terry. I bet if I did the same mph as you I would come close to that.

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post #63 of 91 (permalink) Old 09-19-2015, 12:20 AM
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looking at my Fuelio mileage log

65-70 mph gave 30.87 mpg
slow poke stuff around Edgefield gave 35.0 mpg
twisties up near the highlands going up hill gave 32.13 mpg
slow riding at 35-55 gawking at scenery gave 36.24 mpg
a fast run gave 30.91

all pulling the little woody trailer on the 1800

glancing backwards I see these numbers
35.26, 34.9, 33.33, 34.44, 29.14, 32.53, 29.07,

it is interesting to review what happens under different conditions.

headwinds, RPM, elevation, fuel used, all have an effect.

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post #64 of 91 (permalink) Old 09-19-2015, 06:01 AM
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Originally Posted by AZgl1800 View Post
looking at my Fuelio mileage log

65-70 mph gave 30.87 mpg
slow poke stuff around Edgefield gave 35.0 mpg
twisties up near the highlands going up hill gave 32.13 mpg
slow riding at 35-55 gawking at scenery gave 36.24 mpg
a fast run gave 30.91

all pulling the little woody trailer on the 1800

glancing backwards I see these numbers
35.26, 34.9, 33.33, 34.44, 29.14, 32.53, 29.07,

it is interesting to review what happens under different conditions.

headwinds, RPM, elevation, fuel used, all have an effect.
Really interested in seeing what you get without the trailer. Hard to guess if it's doing what it should when you are wagging that block of wood around everywhere.

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post #65 of 91 (permalink) Old 09-19-2015, 09:33 AM
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Originally Posted by Power Guy View Post
Now that is interesting. I would not have thought of that.
Will post a picture of the bad connection when I get home,I guess there are many things that can effect milage no matter what you ride
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post #66 of 91 (permalink) Old 09-20-2015, 08:37 AM
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Originally Posted by Bluewaterhooker0 View Post
I've had my '97 for almost 3 years. I'm religious about checking mileage at every fill up. The best mileage I have ever gotten was in the mountains, of all places. These are long rides at relatively low speeds, 35-45 mph. I thought the hills and valleys, acceleration and deceleration would really eat up the gas. But to the contrary, I get my best mileage under those conditions, over multiple trips, and multiple days of riding, 45 mpg.
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Originally Posted by tlbranth View Post
'99 GL1500 125,000 miles. My average mileage is 42. Strangely enough, I always get better mileage in the mountains - all bikes & car.
Not surprising as the average 1500 is running around on a lean fuel mixture incapable of fully developing its power potential at a given throttle setting with the pilot screw adjustment playing a big part. Going up in altitude means less oxygen and would richen fuel mixtures and as a side note I would speculate your engines seemed to idle smoother and with more RPM at altitude.

When doing a full tune-up or carb work I do a proper pilot screw adjustment followed by a sync and the owners invariably report back the engine has never run better with more power and smoothness taking throttle, etc.

I use a few different methods for checking mixture settings and they overwhelmingly show/exhibit too lean on these old machines.

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post #67 of 91 (permalink) Old 09-20-2015, 09:32 AM
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I have a 97 GL1500A with 37,000 miles on it. I have new synthetic oil, new air filter (all 3 of them) tires are 85% new and keep 41 psi in both. Have replaced the drive oil per spec, replaced all brake pads (no drag) and inspected the wheel bearings. The only thing I have not replaced is the spark plugs (last replaced at 29,600 miles). I ride about 70 miles 5 days a week. My befst gas mileage to date is 34 mpg. Now I will say that I do 70 to 75 mph and I am a big guy. 6' 3" 290#
I read where some people are getting 40 to 45 mpg. These guys (or gals) must weigh 150# and do 60 mph.
Is my mileage in line in your opinion?
Your MPG sounds about right, my well maintained 99 gets about the same. If you would like your MPG to get better keep your tach under 3K.
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post #68 of 91 (permalink) Old 09-20-2015, 09:40 AM
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I just started a thread on some mileage checks. AZ pointed this thread out to me, so,

Mileage on Vancouver Island Run
Did a few mileage checks on our Winnipeg - Vancouver Island Run

2010 - 1800 Wing - Double up hauling a loaded Timeout Camper

Best - 247.8 klm (154.9 mi) leg - 44mpg (UK) / 36.64mpg (US) / 6.42 ltr/100klm (flats, mountains, and twisty kinda of leg west of Vernon BC)

On a 222.2 klm (138.9 mi) leg at 125kph (78mph) on the flat Saskatchewan prairie - 39.4mph (UK) - 32.81mpg (US) - 7.17 ltr/100klm


In Canada I run regular gas (87oct) In the US I run premium gas (92oct) no real change in mileage or performance. Performance deteriorates if I run regular gas in the US, engine knock no power is the rule of thumb.

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post #69 of 91 (permalink) Old 09-20-2015, 11:18 AM Thread Starter
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Originally Posted by Kyle View Post
I just started a thread on some mileage checks. AZ pointed this thread out to me, so,

Mileage on Vancouver Island Run
Did a few mileage checks on our Winnipeg - Vancouver Island Run

2010 - 1800 Wing - Double up hauling a loaded Timeout Camper

Best - 247.8 klm (154.9 mi) leg - 44mpg (UK) / 36.64mpg (US) / 6.42 ltr/100klm (flats, mountains, and twisty kinda of leg west of Vernon BC)

On a 222.2 klm (138.9 mi) leg at 125kph (78mph) on the flat Saskatchewan prairie - 39.4mph (UK) - 32.81mpg (US) - 7.17 ltr/100klm


In Canada I run regular gas (87oct) In the US I run premium gas (92oct) no real change in mileage or performance. Performance deteriorates if I run regular gas in the US, engine knock no power is the rule of thumb.
I believe on a long run I would get upwards around 38 / 39

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post #70 of 91 (permalink) Old 09-20-2015, 07:18 PM
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Quote:
Originally Posted by DriverRider View Post
Not surprising as the average 1500 is running around on a lean fuel mixture incapable of fully developing its power potential at a given throttle setting with the pilot screw adjustment playing a big part. Going up in altitude means less oxygen and would richen fuel mixtures and as a side note I would speculate your engines seemed to idle smoother and with more RPM at altitude.

When doing a full tune-up or carb work I do a proper pilot screw adjustment followed by a sync and the owners invariably report back the engine has never run better with more power and smoothness taking throttle, etc.

I use a few different methods for checking mixture settings and they overwhelmingly show/exhibit too lean on these old machines.
Well, I'm curious. I had considered the "thin air" theory, but couldn't rationalize the outcome. How does riding around with a "rich" mixture increase mpg ? Is there an unperceived increase in power that makes up for the increased fuel usage ?

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