Fuel Consumption ...

[Hooks]

I have finally worked out what my old bitch is doing .... I took a quick blat over to Wangas and back and took a careful check of how much I used and the distance covered .....

The equation worked out with an 11km/lt result ....This equates to roughly 220km/20lt tank.... how does this compare with other bikes of the same age and size ??? I'd be interested in your feedback. Bear in mind I haven't had the tune-up done yet and she is in need of an oil/filter change.
Also the average speed was around 112kph with me doing the one way trip in just under 40mins .... left at 7pm .....a little drizzle and no wind !! Bloody awesome ride with almost nothing on the road after Sanson !!

[Bounty]

I have finally worked out what my old bitch is doing .... I took a quick blat over to Wangas and back and took a careful check of how much I used and the distance covered .....

The equation worked out with an 11km/lt result ....This equates to roughly 220km/20lt tank.... how does this compare with other bikes of the same age and size ??? I'd be interested in your feedback. Bear in mind I haven't had the tune-up done yet and she is in need of an oil/filter change.
Also the average speed was around 112kph with me doing the one way trip in just under 40mins .... left at 7pm .....a little drizzle and no wind !! Bloody awesome ride with almost nothing on the road after Sanson !!

Over the past 18mths I have had three bikes, a 2003 XV250, 1992 CBR400RR, and currently I am riding the 2001 GSX1200. Every fill I have kept a track of the fuel consumptions for all three bikes. Below are the averages.

XV250 29.97 k/lt
CBR400 22.76 k/lt
GSX1200 15.73 k/lt

Most of my riding is done on the motorways, commuting to and from work, with the occasional ride on the weekends (weather dependent).

With the GSX I haven't had it that long, and recently rode to Taupo to watch the racing, on that trip I was averaging about 17 k/lt, prior to that which was just to and fro work, the consumption was about 13 k/lt.

[Krusti]

My ZZR1100 did 20 km per litre yesturday, cruising Takapuna to Matamata, sons Aprilia RS250 did 16 on same trip.. :scooter:

[sedge]

Pretty sure I get about twice that on the ZZR !...

Sedge.

[magnum]

i average 20km/litre on the road.track it drops to about 8to10kms/litre.its cheap compared with the 600s i know of,still goes like a cut cat. :ride:

[Krusti]

Trouble is whole family, 3 of us go for a ride might as well take the chev!

[toads]

Trouble is whole family, 3 of us go for a ride might as well take the chev!

yes exactly, three bikes using gas makes the car look very economical eh!, but not half the fun

[MSTRS]

For the old fellas here, my GSXR1100 gets approx. 44 MPG - perhaps a little more.

[mangell6]

Having completed a 4000km Sunday ride, I calculated that the Eff Zed One got 17.21km/ltr (48mpg). First time I have had all the receipts and the Treasurer wanted to know the $$$ for the budget. 21Ltr tanks would enable me to travel, umm, further than matthewt. :Pokey:

[Bonez]

Hook I'll have a gander in the shed at my ol 'late '80s m/c mags and see if I can find some roa tests to give you an idea of what you should expect the ol gal.

[dangerous]

220km/20lt tank....
Thats not too bad the Guzzi a 1100inj would get 200km/14lt
and the VTR 1000carb 220km/19lt

[matthewt]

21Ltr tanks would enable me to travel, umm, further than matthewt. :Pokey:

I don't seem to recall you complaining when I was stopping for gas and you were stretching your legs.

For the record the Brutale gets 12.526315789473684210526315789474 L/K which is 34.838815789473684210526315789474 MPG. Believe it or not this is after the fuel chip which improved things.

[matthewt]

First time I have had all the receipts and the Treasurer wanted to know the $$$ for the budget.

I need sponsership for the next big one. $417.18 for gas alone. Lets not talk about tyres or the fact I did 70% of the miles needed for my next service in four days.

[mangell6]

I don't seem to recall you complaining when I was stopping for gas and you were stretching your legs.

Oh so true.

Quite a marked improvement in fuel consumption, around 30%.

:scooter:

[What?]

Sounds a bit thirsty.
My '83 CB1100 does around 13 Km/l at 110 K cruising. Cruise at 120 - 140 it drops to between 11 and 12. 10 Km/l has been known... :shutup:

[Wonko]

I get around 20km/l but for some reason it drops to around 14-15 when ever I go on a Kiwibiker ride. I wonder why?

[dangerous]

Sounds a bit thirsty.
My '83 CB1100 does around 13 Km/l at 110 K cruising. Cruise at 120 - 140 it drops to between 11 and 12. 10 Km/l has been known... :shutup:
But.... 'what' would it do if it were to run on GlenLivet or Glenmorangie?

[zooter]

My '91 Gsx 1100 G does damn near 17 km/ litre even when I'm hustling a little in twisties (but not overly speeding), sounds like you need a tuneup.

[Silage]

For Chch-Nelson-Chch last weekend on the GS1200 we covered 946km and 51.19L of Regular fuel = 18.5km/L or 52mpg. We weren't going overly fast 110ish with few fangs.

[Hooks]

My '91 Gsx 1100 G does damn near 17 km/ litre even when I'm hustling a little in twisties (but not overly speeding), sounds like you need a tuneup.


Yeah it's due next week dosh permitting !! :yeah:

[gav]

Worst bike I had, Honda NS400R, filled up in Murchison, had to switch to reserve before Springs Junction, 19 litre tank, about 80km ride. Had to fill up with gas 4 times Nelson - Chch.

[Bonez]

45 miles per Imp gallon is whats mentioned in an '89 Motor Cycle International mag.

[Hooks]

45 miles per Imp gallon is whats mentioned in an '89 Motor Cycle International mag.

Cheers mate !! ... now where is the converter thingy ...... :thud:

Found it...so by my calculations I should be doing around 16/lt does that sound right to you guys ???

[Bonez]

Cheers mate !! ... now where is the converter thingy ...... :thud:

Found it...so by my calculations I should be doing around 16/lt does that sound right to you guys ???Just reading an '84 test by "Mechanics"-The Practacle M/C Magizine. They stated 35mpg average, 47mpg at around 60-70mph and 35mpg worst.

Interesting reading the last paragraph-" Suzuki have already taken some stick for revamping what many call an already old model, But don't be ashamed, far from it. It's easily the most powerfull engine around and the bike handles well. if Suzuki can remain compeditive with a machine that developed from earlier models they deserve a pat on the back. It's easy to bring out a new model and then replace it within a couple of years. The difficulty is bringing out a new model that is here to stay. Suzuki's got one, the others are still looking" ;) lol. This was 20 years ago.

[JohnBoy]

like i have once said, i am on first name basis with the boys at the local servo.
the zed has 39mm flatsides which are not the most eco friendly, but provide plenty of go.

just worked out that i am around 14km per litre of 96 on the road. however i have used a full tank on a track day once (of race gas @ $1.60 a litre!) in 80 kms so about 7km per litre.

:ride:

[dangerous]

like i have once said, i am on first name basis with the boys at the local servo.
the zed has 39mm flatsides which are not the most eco friendly, but provide plenty of go.

just worked out that i am around 14km per litre of 96 on the road. however i have used a full tank on a track day once (of race gas @ $1.60 a litre!) in 80 kms so about 7km per litre.

:ride:
yeah but dont forget that race gas /ave gas burns a lot faster than the shit at the servo... so you wont get a true km/lt reading

[Bonez]

yeah but dont forget that race gas /ave gas burns a lot faster than the shit at the servo... so you wont get a true km/lt readingHah? :unsure: :unsure: :unsure:

[Coyote]

My CBR manages roughly 18 km/l. This isn't an exact measure as I didn't record exact numbers. I just filled the tank with 10 bucks worth of 98 and set the tripometer and all I remeber is the numbers rounded off

[dangerous]

Hah? :unsure: :unsure: :unsure:
avgas is what aircraft use and race gas (shell #1) #1 is stale avgas which has past its useby date (cos ya dont want to take a chance when ya flying aye) but dosent really make a diff in our bikes.

Anyhow, at 100 octain +/- 5 the fuel burns a hole lot quicker, as in the time it takes to burn up in the head (sorry cant remember tech words) is faster than crapy 91/96 which I have seen as being up to 15oct +/- (usually below rated oct) there fore you tend to use more.

I have run 100oct and 91oct (on the rd) in most of my bikes and found that km per lt is way down on the 100oct...... but I do have to say the bikes prefure it the Guzzi actually ideled on it and the turbo had a huge mid range in provment as did the naturally asperated CX were as the VTR just pulls harder right through the rev range.

[Bonez]

Anyhow, at 100 octain +/- 5 the fuel burns a hole lot quicker, as in the time it takes to burn up in the head (sorry cant remember tech words) is faster than crapy 91/96 which I have seen as being up to 15oct +/- (usually below rated oct) there fore you tend to use more.
Therefore the litres used per km is higher right?

[dangerous]

Therefore the litres used per km is higher right?
correct........ weres the damn book

[Hitcher]

Buy an ST1300 and you get all of this information on your dash readout! Ta dah!

My best economy so far is 56.1kml (downhill in top with a tail wind descending into the Waitotara valley), compared with 13.2kml climbing out the other side...

A good fang off the lights gets things down into single numbers.

Normal highway cruising (110-120kmh in top) sees things hover at between 20-22kml.

I must try 96 octane and see if this makes any discernable difference.

[dangerous]

I must try 96 octane and see if this makes any discernable difference.
none apart from sooting ya pipes up and cloging the engine up with more bad NZ fuel additives...... 96 is the same crap as 91 but with extra benzine and other shit to raise the octain up which is not a good thing...... bring back lead I say.

[riffer]

I used to get 17 km/l when I had my bike restricted (2LM spec), but since its been derestricted (2NK spec) its down to 15 km/l.

Of course, its a bit quicker now... but it has nearly 30 more HP. :stoogie:

[avgas]

Trouble is whole family, 3 of us go for a ride might as well take the chev!
After i had a few guys work on my old RG it went like a rocket.......but my mate got better fuel consumtion driving his 3L twinturbo 300ZX

[avgas]

yeah but dont forget that race gas /ave gas burns a lot faster than the shit at the servo... so you wont get a true km/lt reading
Strange, most of the time when i run a higher octane gas i get slighter better fuel consumtion. Only objection to this rule was my RG, which ran 10k/l on 98 and 8k/l on avgas.
GB ran 30k/l on 98 and 35k/l on avgas.
havent been able to find some avgas for the ZXR though.
but i rode those bikes flat tack alot of the time - it was fun on avgas :eek:

[ktulu]

I was pretty gutted when I took my RGV out for its first ride and I had to switch to reserve after only 130km... then filled it up almost immediately with 12.5 litres.... that sucks... just over 10kms to a litre, worse then my parents 5.7l V8

[MSTRS]

I had a 1974 CB500/4 with 610cc kit in it - that was one seriously thirsty mutha. Used to ride L/Hutt - Levin a bit in those days (1977) That is about 100k one way. Bike had a 3gal tank (13.5l). If I rode it hard I could empty the tank each way.

[Racey Rider]

yeah but dont forget that race gas /ave gas burns a lot faster than the shit at the servo... so you wont get a true km/lt reading

Please check your info.
I thought 91 was the fastest burning fuel. 96 is slower, Ave gas is slower still.
Which is why if your motor is detonating on 91, you increace the octane to 96 (or higher) - which will produce a slower burning flame front, which is one way to stop detonation.
Also the slower burning flame front CAN create less power in your motor (unless your motor is set up for it), which causes you to twist your wrist more to get the same speed, thus using more fuel.

We will both check our info then. :sweatdrop

And search this site for other "Octane" "Detonation" threads.

PS. From another thread.

.....
You shoud find that when running on 100oct (leaded the real oct boster) you get a smother and more powerfull mid range it is certinly noticable in the high compression Guzzi but not as much in the VTR.

Note: High Compression Guzze. A different story to normal compression bikes.

Off another web site:
BURNING SPEED is the speed at which a fuel releases its energy. In a high speed internal combustion engine there is very little time (real time - not crank rotation) for the fuel to release its energy. Peak cylinder pressure should occur around 20 degrees ATDC. If the fuel is still burning after this, it is not contributing to peak cylinder pressure, which is what the rear wheels see.

Also see: Fuel and Fuel systems (http://www.grapeaperacing.com/GrapeApeRacing/tech/fuelsystems.pdf)


Why do we keep having this thread? :doh:

Look, peoples:

The higher octane rating means the fuel is less prone to pre-igniting ("pinking"). Unless your engine is high-compression and the manufacturer specifically calls for high octane, you're wasting your time and money using high-octane petrol. If your bike must drink 95 RON, then use Gull's 97 (?), and if it must have higher than that, use BP's Ultimate.
Most high-octane fuels apart from imported refined fuels (BP 98, and Gull's fuels) are loaded with toluene and xylene, which burns dirty, and does your engine no good.
Motorcyle engine management systems are usually unable to adjust to different fuels (no EGO sensor), so apart from reducing pinking by running high-octane petrol, you're better off with the lowest octane rating your bike is happy with, as it will give MORE power than the slower-igniting high octane fuels, won't soot up the plugs and rings, won't wreck rubber/platic components, and will cost less.

If you're really concerned about what fuel to use, then (a) find out what is recommended for your machine; (b) do some research on the Interweb to find out about octane ratings, and (c) don't bother asking other people - the 'info' you get will be anecdotal, subjective and unscientific. "Feels faster", "runs smoother", "accelerates more quickerer" is never quantified, and therefore almost useless.

Hope this helps.

[FlyingDutchMan]

Couldn't agree more RR. I didn't know about the other fuels being better quality though... Apparently the refinery at marsden point is getting an upgrade finished this year - one can only hope we getter better petrol.

My bike was getting 17km/l a couple pf weeks ago, then I changed the oil and got the tyre pressures right and its now doing 21km/l. I'm wondering how much better it will go with a carby tune and new plugs.

[Krusti]

none apart from sooting ya pipes up and cloging the engine up with more bad NZ fuel additives...... 96 is the same crap as 91 but with extra benzine and other shit to raise the octain up which is not a good thing...... bring back lead I say.

In sons MX bike, used to run 2 thirds 91, 1 third Avgas, was told it was as close as you can get to old super.

Fert pilot who we got avgas off reckons their fuel was 120 something plus octane which was the minumim allowed. Then the old stuff got turned into race fuel as soon as rating dropped.

We bought 200 litre drum off Mobil cost us $2 litre had to sign for it declaring we would not use in road vehicle. Yeah Right. Off pilot $1.27 :whocares:

[Wonko]

Fresh off the clock 20.5km/l from the tank to the autoban yesterday, 18km/l to Hamilton and back to Ngaruawahia

[vifferman]

Commuting on the VTR, I used to get about 10km/litre (28mpg) and sometimes as many as 11km/l (33mpg).

On the VFR (~same HP, slightly heavier), I get about 15km/l (45mpg)commuting, and up to 19 km/l (52mpg) on the highway.:gob: Strange thing is, because of the way the fuel injection works, a large throttle opening is (stoichiometrically speaking) more fuel efficient, due to more air being rammed through the engine.

[Hitcher]

a large throttle opening is (stochiometrically speaking) more fuel efficient, due to more air being rammed through the engine.
He shoots, he nearly scores... Stoichiometric. Very nice attempt.

[dangerous]

[COLOR=Blue]Please check your info.
Yeah... sorry bout that, been tied up on another thread...... yeah, my balls up RR it appairs I have my info back to frount, my bad.
A few years back Chalange set up down here importing there fuel frm Oz, I have seen tests done on ther fuel and the crappy NZ stuff.... Chalanges fuel 96 came in at an avarage of 98 were as NZ fuel 96 came in at an avarage of 91 and 91 avaraged 87..... so NZ fuel is shit.
You n/i crowd what fuel companies do you have up ther I have heard of Gull do they import there fuel..... and I believe you can get 98oct from Mobil, be great to have the choice down here...... BTW Caltex brought out Chalange.... that was the end of that.

[What?]

Some quite interesting figures shown here, but most of them have no relevance to the question: what should an early 80's 1100/4 be drinking? Twenty years of technology plus aerodynamic fairings have made a huge difference. Still, it is nice to see that sort advance quantified in some way other than HP / top speed.
BTW, my F650GS (injected) gets an easy 23 Km/l. The old carburreted model only did 18Km/l.

[What?]

But.... 'what' would it do if it were to run on GlenLivet or Glenmorangie?
About $18,000 per Km, I should think :thud:

[Jantar]

I have finally worked out what my old bitch is doing .... I took a quick blat over to Wangas and back and took a careful check of how much I used and the distance covered .....

The equation worked out with an 11km/lt result ....This equates to roughly 220km/20lt tank.... how does this compare with other bikes of the same age and size ??? I'd be interested in your feedback. Bear in mind I haven't had the tune-up done yet and she is in need of an oil/filter change.
Also the average speed was around 112kph with me doing the one way trip in just under 40mins .... left at 7pm .....a little drizzle and no wind !! Bloody awesome ride with almost nothing on the road after Sanson !!

My old GSX1100E used to give me around 13 - 14 km/l, so I suspect that you could probably get a touch more out of an EF. My current GS1200 gives 17 - 18 km/l and is based on the same motor, just a bit more modern.

[MSTRS]

I've figured out which buttons to press on the calculator and come up with- wait for it - 16.5k/l for my 1989 GSX-R1100 (it is xJapper so translates to about '91NZ) The CB500 did about 7.5k/l *shudder* which translates to over double the gas in exchange for about half of everything else :ar15:

[Hooks]

I've figured out which buttons to press on the calculator and come up with- wait for it - 16.5k/l for my 1989 GSX-R1100 (it is xJapper so translates to about '91NZ) The CB500 did about 7.5k/l *shudder* which translates to over double the gas in exchange for about half of everything else :ar15:

:shutup: :shutup: :shutup: :doh: :lol:

[Bonez]

I had a 1974 CB500/4 with 610cc kit in it - that was one seriously thirsty mutha. Used to ride L/Hutt - Levin a bit in those days (1977) That is about 100k one way. Bike had a 3gal tank (13.5l). If I rode it hard I could empty the tank each way.
Total was 3.1 Imp gallons or 14 litres. Reserve was 0.9 of a gallon or 4 litres. giving 2.2 gallons or 10 litres on the main.

[MSTRS]

But wasn't there a about gallon in reserve?
Don't remember - would you want to test at 20mpg?

[MSTRS]

The CB500 did about 7.5k/l *shudder* which translates to over double the gas in exchange for about half of everything else :ar15:
Praps a little unfair on the CB - it could 'pin' the speedo needle - past the 200kph mark.

[Bonez]

My old GSX1100E used to give me around 13 - 14 km/l, so I suspect that you could probably get a touch more out of an EF. My current GS1200 gives 17 - 18 km/l and is based on the same motor, just a bit more modern. The EF is based on the earlier GSX motor not the alternator behind the barrel oil/air cooled jobby.

[Holy Roller]

My old GSX1100E used to give me around 13 - 14 km/l, so I suspect that you could probably get a touch more out of an EF. My current GS1200 gives 17 - 18 km/l and is based on the same motor, just a bit more modern.
The old XV gives me 17.3Km/L I may as well be riding something bigger.... :ride: