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[dsn_klr650] octane preferences
Posted: Wed May 17, 2000 7:02 am
by Ted Palmer
Tumu Rock wrote:
>
> Just curious what octanes fellow listers are using.
[...]
Down here in Oz we have a few choices.
There is 91 unleaded (ULP), 96 premium unleaded (PULP), 95 leaded
(Super), or Shell 98 Optimax unleaded.
In Western Australia there is no leaded fuel anymore and there is
some fuel called "LRP" (Lead Replacement Petrol) which is supposed
to be ok in cars that normally would need leaded.
Eventually LRP will replace all leaded fuels here.
On the bike newgroup here, LRP is almost universally regarded by users
as garbage. It makes bikes and cars run bad, fouls plugs etc.
I generally use PULP or leaded. I haven't tried the Optimax in the
KLR yet. I must get around to putting that bike back together.
Back when the starter clutch was NBG and I had to resort to the kick
starter, I found that the bike started a bit easier on ULP.
Mister_T
[dsn_klr650] octane preferences
Posted: Wed May 17, 2000 8:11 am
by Verle Nelson
From: "Tumu Rock"
> Just curious what octanes fellow listers are using. I currently use 93
since
> the difference of $0.20 a gallon (from 87 to 93) works out to only about
$1
> more per tank. I just assume higher octane is better but maybe I'm wasting
a
> buck a tank?
My hearing is bad -- too many years long ago riding with open-face helmets
and no ear plugs, I guess. I assume I would not hear detonation under most
conditions, especially with a good full-coverage street helmet or dirt
helmet with ear plugs. I routinely use the highest octane available and
worry less.
I'm hoping I don't hear my exhaust when it "tweets." Who knows? Maybe it
already tweets.
Verle Nelson
Cedaredge, CO
[dsn_klr650] octane preferences
Posted: Wed May 17, 2000 8:16 am
by Tom Bowman
DBB wrote:
> Just curious what octanes fellow listers are using. I currently use 93
since
> the difference of $0.20 a gallon (from 87 to 93) works out to only about
$1
> more per tank. I just assume higher octane is better but maybe I'm
wasting a
> buck a tank?
>
> dat brooklyn bum
The higher the octane number, the lower the energy per pound in the
gasoline, hence, the lowest octane fuel *on which your engine does not
knock* is best for mileage and power. "Knock" is that nasty metallic
rattling under load you hear when accelerating, and it destroys engine
parts over time. Some people are oblivious to engine noises and if you
don't know what you're listening for just use premium fuel and
fuhgeddaboudit, but if you learn to listen carefully you can hear knock,
typically when loading the engine hard at low revs off the line or when
"cracking" the throttle from a cruise speed.
Brace yourselves, boys: here comes another "oil thread"......
Hope this helps.
Tom Bowman
Atlanta
A14
[dsn_klr650] octane preferences
Posted: Wed May 17, 2000 9:52 am
by Weaver, Mark
you're probably wasting some money. the octane basically reflects the
resistance to pre-ignition or "knock" or detonation or whatever you call it.
i'm sure a smart person will chime in and correct/clarify before long. i
find with 87 i get an occasional knock at high throttle, medium-low revs
(3500-4000) in 4th and 5th gear. my wife's bike is even worse (probably
because it takes more throttle to make a 225 go). with 89 octane it seems to
go away. i think her xt225 is also higher compression than a klr, which
contributes to knock as well, since with the engine hot, (enough)
compression by itself can ignite the gas without a spark. that's how diesels
work.
my method (recommended by my brother, supposedly one of the world's foremost
experts on diesel emissions and air quality), is to use the lowest octane
gas that doesn't knock much, which for me is 89. your results may vary.
mw
> -----Original Message-----
> From: Tumu Rock [mailto:guymanbro@...]
> Sent: Wednesday, May 17, 2000 1:50 AM
> To:
DSN_KLR650@egroups.com
> Subject: [DSN_klr650] Octane preferences
>
>
>
> Just curious what octanes fellow listers are using. I
> currently use 93 since
> the difference of $0.20 a gallon (from 87 to 93) works out to
> only about $1
> more per tank. I just assume higher octane is better but
> maybe I'm wasting a
> buck a tank?
>
> dat brooklyn bum
>
>
>
>
>
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[dsn_klr650] octane preferences
Posted: Wed May 17, 2000 9:57 am
by Weaver, Mark
you guys still have lead down there? no wonder all the ozzies i know are
such psychos. that stuff is bad for you. it's really, really bad for your
kids. i'm pretty sure it's been a long time since any car that really needs
lead was built. i thought it was just a valve lubricant and that modern
(since the 70's) extra-hard valves made it superfluous, except for causing
brain and nervous system damage.
-mark weaver
ted wrote:
> > Just curious what octanes fellow listers are using.
> [...]
>
> Down here in Oz we have a few choices.
> There is 91 unleaded (ULP), 96 premium unleaded (PULP), 95 leaded
> (Super), or Shell 98 Optimax unleaded.
> In Western Australia there is no leaded fuel anymore and there is
> some fuel called "LRP" (Lead Replacement Petrol) which is supposed
> to be ok in cars that normally would need leaded.
> Eventually LRP will replace all leaded fuels here.
> On the bike newgroup here, LRP is almost universally regarded by users
> as garbage. It makes bikes and cars run bad, fouls plugs etc.
>
> I generally use PULP or leaded. I haven't tried the Optimax in the
> KLR yet. I must get around to putting that bike back together.
> Back when the starter clutch was NBG and I had to resort to the kick
> starter, I found that the bike started a bit easier on ULP.
>
> Mister_T
>
>
[dsn_klr650] octane preferences
Posted: Wed May 17, 2000 1:01 pm
by Shepard,Brian
I use Sunoco Ultra 94. All my vehicles seem to run noticeably better.
-Brian Shepard
Philadelphia PA
A13
-----Original Message-----
From: Tumu Rock [mailto:guymanbro@...]
Sent: Wednesday, May 17, 2000 4:50 AM
To:
DSN_KLR650@egroups.com
Subject: [DSN_klr650] Octane preferences
Just curious what octanes fellow listers are using. I currently use 93 since
the difference of $0.20 a gallon (from 87 to 93) works out to only about $1
more per tank. I just assume higher octane is better but maybe I'm wasting a
buck a tank?
dat brooklyn bum
_______________________________________________________
Get 100% FREE Internet Access powered by Excite
Visit
http://freelane.excite.com/freeisp
------------------------------------------------------------------------
Remember four years of good friends, bad clothes, explosive chemistry
experiments.
http://click.egroups.com/1/4051/5/_/911801/_/958553379/
------------------------------------------------------------------------
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http://www.listquest.com/lq/search.html?ln=klr650
Support Dual Sport News... dsneditor@...
Let's keep this list SPAM free!
Visit our site at
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[dsn_klr650] octane preferences
Posted: Wed May 17, 2000 1:33 pm
by John Laybolt
I had an 84 Ford Falcon in OZ for some time and I'm
convinced it needed leaded gas. I liked to run 1/2
leaded and 1/2 regular. If I went too much towards
the unleaded end the car ran poorly.
John
+++++++++++++
--- "Weaver, Mark" wrote:
> you guys still have lead down there? no wonder all
> the ozzies i know are
> such psychos. that stuff is bad for you. it's
> really, really bad for your
> kids. i'm pretty sure it's been a long time since
> any car that really needs
> lead was built. i thought it was just a valve
> lubricant and that modern
> (since the 70's) extra-hard valves made it
> superfluous, except for causing
> brain and nervous system damage.
> -mark weaver
>
> ted wrote:
> > > Just curious what octanes fellow listers are
> using.
> > [...]
> >
> > Down here in Oz we have a few choices.
> > There is 91 unleaded (ULP), 96 premium unleaded
> (PULP), 95 leaded
> > (Super), or Shell 98 Optimax unleaded.
> > In Western Australia there is no leaded fuel
> anymore and there is
> > some fuel called "LRP" (Lead Replacement Petrol)
> which is supposed
> > to be ok in cars that normally would need leaded.
> > Eventually LRP will replace all leaded fuels here.
> > On the bike newgroup here, LRP is almost
> universally regarded by users
> > as garbage. It makes bikes and cars run bad, fouls
> plugs etc.
> >
> > I generally use PULP or leaded. I haven't tried
> the Optimax in the
> > KLR yet. I must get around to putting that bike
> back together.
> > Back when the starter clutch was NBG and I had to
> resort to the kick
> > starter, I found that the bike started a bit
> easier on ULP.
> >
> > Mister_T
> >
> >
>
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[dsn_klr650] octane preferences
Posted: Wed May 17, 2000 7:03 pm
by Skip Faulkner
>
> Just curious what octanes fellow listers are using. I currently use 93
since
> the difference of $0.20 a gallon (from 87 to 93) works out to only about
$1
> more per tank. I just assume higher octane is better but maybe I'm wasting
a
> buck a tank?
>
> dat brooklyn bum
There is absolutely no advantage to running a higher octane rating than your
engine needs to control detonation. In other words, if you are using 88 and
you`re not knocking or detonating, you`re throwing away your money by going
up. The one exception is in cooling. In some cases, if overheating is a
problem, a fuel with a lower octane rating will help, as it burns cooler. A
good example is here in Montana a lot of snowcatters like to use avgas in
their machines, not only for the higher octane (high compression engines)
but because it burns hotter. BUT, for spring riding, they`ll switch to a
lower octane rating because the higher octane is burning too hot for the
spring temperatures. A lot of pilots, that have the STC to legally allow
them to do it, will burn auto gas in the summer ( lower altitudes) and the
higher octane avgas in the winter.
To put it simply, the octane you need is determined by what your engine
needs to control detonation, thats all.
Skip
muz
Posted: Thu May 18, 2000 5:59 am
by danorte@aol.com
The MuZ county is similar to the Tengai, but seems less power. The Rotax
motor is quite nice. HUGE tank like the KLR. 6 gal. with mi. about 50mpg. The
seat is comfortable like the KLR. Initially soft foam with firmer stuff
underneath. It has the same Bing CV carbs as my BMW so there is some sameness
of repair. Negatives include lack of aftermarket equipt. Hard to find or most
expensive. There are racks available but expensive. I am selling it by the
way. I have the service manuals and some spares.
1992 R 100R . 1965 R 50/2 1995 MuZ Country
Douglas North
Charlotte NC
#2852