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Discussion Starter · #1 ·
I just had full tune up done on my 1997 GW 1500SE.
Replaced spark plugs to new rodium plugs.
Got Mobile 1 10-40 full synthetic Oil.
Performance Airfilter.
New Good year Tires.
Rode from Ft Myers to Orlando and back.
To Orlando I took Highways interstae 27only 70-75 MPH, 55PSI on shocks.
On my way back took interstate 17 -55 to 65 MPH 30PSI on shocks
Trip to Orlando I was averaging 36.6 MPG
Trip to Ft Mers 44.8 MPG
So, speed and suspension makes a big difference.
 

· Pwhoever
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I'm a little skeptical of rear shock pressure having any impact on mpg's. But, speed definitely does affect it. The sweet spot is around 60mph but also keeping an eye on your tach and keeping it under 3000rpm. If you do those, your mpg will be the highest. Get up around 70mph and higher and tach over 3000rpm and you will see your mpg suffer...

Oh yeah, welcome to Goldwingfacts. You will find lots of useful info for your GL1500 here.
 

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Piaggio MP3, was 02 GL1800
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the 1500s average 33.3 mpg year over year.
I don't care what a Single Tank "appears to show". those calculations aren't worth zip.

I had a '94 and a '98, and both of them on Spreadsheets, over 1,000s of miles,
and the spreadsheet shows 33.3 AVG MPG at the top of the sheet.

yup, single tanks at 44+ with gentle throttle, no winds, and down hill.
this pix is just a Screenshot showing the top of the page.
if anyone wants the actual Spreadsheet, it is free, you can over-write my info.



Product Font Software Rectangle Screenshot
 

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Piaggio MP3, was 02 GL1800
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63,393 Posts
got to thinking about that, I switched over the T6 5w40 because I had the '02 model year, which has in some cases, had the Alternator Drive Gear shear off, IF, some Klutz twists the throttle up immediately when starting the engine....

cold oil does not circulate well, but the 5w works super fine....
the Oil Pressure is up on the gauge in about 3 seconds or less, or was it a RED light?
been too long since I rode it now....

whatever, even with T6 5w40, the clutch does NOT slip, and I rode it hard to see.
 

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As long as the full synthetic doesn't have friction modifiers in it, you're fine re. the clutch. Sometimes it will say "resource conserving" which is the same thing...not good for our clutches. All that will be on the API services circle...usually on the back of the can or bottle. If the bottom of that circle is empty, you're good to go cuz it has none of the above modifiers in it.
 
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