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Old 09-13-2012, 07:57 AM   #46
hexnut
just cruising
 
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Joined: Feb 2011
Location: middle Tennessee
Oddometer: 1,165
Quote:
Originally Posted by BuzzJ View Post
As of the last fillup with 92 octane I am getting 72mpg as opposed to 63mpg with 87.
Unless you have raised the compression or advanced the timing you will get no benifit from high octane. 87 and 92 have the same energy content. 92 burns slower to retard knock in higher compression engines.

http://forum.ih8mud.com/80-series-te...cts-myths.html

http://en.wikipedia.org/wiki/Octane_rating
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hexnuts...a curse put on your balls by a mean gypsy
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hexnut screwed with this post 09-13-2012 at 08:49 AM
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Old 09-13-2012, 08:19 AM   #47
byron555
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Joined: Oct 2007
Location: Central Wisconsin
Oddometer: 1,010
Get a WR250r or Crf250L

Quote:
Originally Posted by outofcontrol View Post
I've almost got this scooter sorted out. Now I'm on the quest for the MPG that it should have. Somehow I'm wasting fuel somewhere.
I'm on my fourth tank, and averaging 51.7mpg.
51.0
50.3
53.9 (this one I tried to ease up on the throttle as much as possible and drive for economy, and had a couple oz of Seafoam)



Kevin
My WRr gets 52 to 56 mpg combined (interstate at 70 mph plus some city) the CRF is reported to do even better, both burn cleaner too

That is my MPG... just trolling for fun. hope you get it all worked out....
In Wisconsin, the family fleet MPG AVG combined figures for each

Hyundai Veracruz (family truckster) = 20
VW Jetta TDI = 45
Yamaha WR250r = 53

overall (simplified/CAFE) avg = 39.3mpg

The VW is BY FAR THE MOST impressive, due to GVW, passengers etc... Damn thing will do 52 mpg on a HWY trip at 75mph. that is truly awesome.

I am not a hyper-mpg guy by the way.
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xr50r.... More than I can Handle
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