What fuel?

**Newo** · 13th February 2011, 13:07

Yeah, I get about 200-220 before I hit reserve, and when I fill up I can usually squeeze in just over 10L

**Autech** · 14th February 2011, 18:26

95 or 98, and only ever BP or Shell V-Power.
For no other reason than the bike feels good on it

Did a track day on Sat and still got over 20ks per litre

Hyo economy FTW, now if only they could sort out their shit suspension

**frogfeaturesFZR** · 15th February 2011, 09:04

Was told by a mechanic mate that GULL gas is a better quality, processed in Singapore.

**Autech** · 15th February 2011, 16:38

Yeah Gull is good fuel, use it in my car but not the bike as the seals on the carbs MAY not like the ethenol

**racefactory** · 2nd March 2011, 18:29

Originally Posted by SMOKEU

98. I've recently started to use 91 to see if it makes any difference, but it doesn't seem to. I hope it won't detonate on 91.

No it will be fine, run it. Or you could feed the petrol companies more?

**racefactory** · 2nd March 2011, 18:35

Originally Posted by SMOKEU

My CBR250 drinks around 4.5L/100km. My old 2L car drank 16L/100km when driven sedately.

That's fucking terrible. My 06 zx6r gets 4.4l/100km on open road and I can stretch it to almost 4l/100km flat when on a constant sub 100kmh cruise. On Honda NC30's I got 3.5l/100km. Must be raping that bike of yours everywhere.

I do use some hypermiling technique though. Still, on a CBR250RR you should be getting 3l/100km on a constant steady sub 100kmh cruise. According to Honda it does 2.5l/100km at 60kmh and I have found they are not dreaming either. If you are really steady with the throttle and keep the speed down you will get really good mileage out of these bikes.

**CookMySock** · 2nd March 2011, 19:03

All (4) of my bikes run exactly the same regardless of what fuel I use. Fuel endurance (range) is a good 20% better on the higher octane fuels.

Two strokes seem to run better on the faster burning (lower octane) fuels.

**D3ALN** · 2nd March 2011, 20:56

Whatever petrol you use get bike jetted to suit. A guy a rides with runs his wr450 on half av gas half petrol. and has had jetted to suit runs mint my bike has been jetted for 91 I run 91 and can keep up. aswell as a 250 would

**SMOKEU** · 2nd March 2011, 21:26

Originally Posted by racefactory

That's fucking terrible. My 06 zx6r gets 4.4l/100km on open road and I can stretch it to almost 4l/100km flat when on a constant sub 100kmh cruise. On Honda NC30's I got 3.5l/100km. Must be raping that bike of yours everywhere.

I do use some hypermiling technique though. Still, on a CBR250RR you should be getting 3l/100km on a constant steady sub 100kmh cruise. According to Honda it does 2.5l/100km at 60kmh and I have found they are not dreaming either. If you are really steady with the throttle and keep the speed down you will get really good mileage out of these bikes.

There's not much point in owning any 4 cylinder CBR unless you're going to trash it a lot.

**p.dath** · 3rd March 2011, 12:03

Originally Posted by SMOKEU

What octane fuel do you guys use in your 250s?

I'd used 91 in a CBR250RR. It does not have fuel injection.

Using a higher Octane fuel will not change anything except empty your wallet faster.

**bsasuper** · 5th March 2011, 19:24

Originally Posted by p.dath

I'd used 91 in a CBR250RR. It does not have fuel injection.

Using a higher Octane fuel will not change anything except empty your wallet faster.

Whats your reasoning behind having no FI?, Carbed bikes were actually very well tuned.I get around 30km's more a tank on all my bikes using 96 octane.

**p.dath** · 6th March 2011, 10:12

Originally Posted by bsasuper

Whats your reasoning behind having no FI?, Carbed bikes were actually very well tuned.I get around 30km's more a tank on all my bikes using 96 octane.

Bikes with fuel injection can (though not guaranteed to) have the capability to adapt to fuel of different octane. They can change when the firing is done.

Carb'd bikes are statically tuned. And most people want to know what will happen if they simply put a different octane in their tank. And if that is the only thing you do, then their is likely to be no change.

**bsasuper** · 6th March 2011, 20:45

99% of bikes than run FI dont have a knock sensor,they run a "set" ignition map, so dont know what octane fuel its squirting into the cylinder,the fuel map is also "set" (hence dyno tuners make a shit load of money by telling you your bike is now running a lot better now that they have re-maped it).Even in the 90's when I was riding bikes like the ZZR1100( carbs), it ran heaps better with 96 octane fuel.

**eden** · 30th March 2011, 23:31

Originally Posted by bsasuper

99% of bikes than run FI dont have a knock sensor,they run a "set" ignition map, so dont know what octane fuel its squirting into the cylinder,the fuel map is also "set" (hence dyno tuners make a shit load of money by telling you your bike is now running a lot better now that they have re-maped it).Even in the 90's when I was riding bikes like the ZZR1100( carbs), it ran heaps better with 96 octane fuel.

Forgive my ignorance, i bought my bike last week, and got my licence today so still super newb.

So if i'm running a 1993 suzuki bandit 250 on 98, can i get it set to run constantly on 98 or 91 depending on what my wallet says? Or should i just play around with the different fuel types to see which one the bike likes best? I'm not too sure if chopping and changing fuel will be bad for the bike so im hesitant to try.

Just another thing too, what does it mean when your bike 'knocks'? What's actually happening when this happens, and what should i be looking/listening for?