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Ted Palmer
Posts: 1068
Joined: Sat Apr 08, 2000 7:09 am

[dsn_klr650] octane preferences

Post by Ted Palmer » Wed May 17, 2000 7:02 am

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

Verle Nelson
Posts: 63
Joined: Thu Apr 06, 2000 7:35 pm

[dsn_klr650] octane preferences

Post by Verle Nelson » Wed May 17, 2000 8:11 am

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

Tom Bowman
Posts: 30
Joined: Thu Aug 10, 2000 12:47 pm

[dsn_klr650] octane preferences

Post by Tom Bowman » Wed May 17, 2000 8:16 am

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

Weaver, Mark
Posts: 205
Joined: Thu Apr 06, 2000 3:03 pm

[dsn_klr650] octane preferences

Post by Weaver, Mark » Wed May 17, 2000 9:52 am

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 > > > > > > _______________________________________________________ > 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/ > -------------------------------------------------------------- > ---------- > > Visit the KLR650 archives at > 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 http://www.egroups.com/group/DSN_klr650 > To unsubscribe from this group, send an email to: > DSN_klr650-unsubscribe@egroups.com > >

Weaver, Mark
Posts: 205
Joined: Thu Apr 06, 2000 3:03 pm

[dsn_klr650] octane preferences

Post by Weaver, Mark » Wed May 17, 2000 9:57 am

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 > >

Shepard,Brian
Posts: 62
Joined: Fri May 12, 2000 1:12 pm

[dsn_klr650] octane preferences

Post by Shepard,Brian » Wed May 17, 2000 1:01 pm

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/ ------------------------------------------------------------------------ Visit the KLR650 archives at 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 http://www.egroups.com/group/DSN_klr650 To unsubscribe from this group, send an email to: DSN_klr650-unsubscribe@egroups.com

John Laybolt
Posts: 27
Joined: Sun Apr 09, 2000 6:36 pm

[dsn_klr650] octane preferences

Post by John Laybolt » Wed May 17, 2000 1:33 pm

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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Skip Faulkner
Posts: 103
Joined: Fri Apr 14, 2000 9:08 am

[dsn_klr650] octane preferences

Post by Skip Faulkner » Wed May 17, 2000 7:03 pm

> > 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

danorte@aol.com
Posts: 3
Joined: Wed May 17, 2000 5:19 pm

muz

Post by danorte@aol.com » Thu May 18, 2000 5:59 am

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

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