Kawasaki Sportsbike Riders Club - Australia - Online Forum

Depends on what you ride. Generally most carby bikes run best on regular unleaded as that's what they're designed to run on. My old baby blade would only run on regular, tried various higher octane stuff and it ran like crap!!
I use premium in my current bike as that's what it's designed to run on, and it's EFI.

Technik wrote:High Octane 98 for my ZX-636 as well, though i haven't tried to put normal unleaded fuel yet.

The difference is dissapointing

jewjew wrote:I just use standard unleaded, i was told to get my fuel from woolworths servo's because they go through so much fuel with their discounts you can be pretty sure they have good clean fuel.

Having said that, i only use mobil cause i have a mobil card with a good discount on it.

We use a Woolworths servo (we have a starcard) and the GPX ran fine on their unleaded. Curiously tho, my car hates it - but it likes BP unleaded.

98 octane only in the MFP12, and also the Black Pearl. The Pearl has modified combustion chambers, pistons, intake and exhaust porting, so even though its a 1980 bike, it works *way* better on the Hi-octane stuff. (plus its an EFI bike as well...)

All the other shitheaps run on standard 91, it works the best for them.

Mick C wrote:I use high-octane in the 10 because that is what it is designed to take. Like I said in the other thread, the GPX250 doesn't have the compression ratio and timing for high-octane and will run just as well, or most likely better, with regular unleaded.

The old Z650+ has regular in it for that reason.

yup...i run 98 in the zed, and the old cbr...

the ute gets 91 (v6 commy)...

the old cbr use to get 98 plus a dash of "octane booster" for track days, long rides or spirited scratching...

ross79 wrote:Depends on what you ride. Generally most carby bikes run best on regular unleaded as that's what they're designed to run on. My old baby blade would only run on regular, tried various higher octane stuff and it ran like crap!!
I use premium in my current bike as that's what it's designed to run on, and it's EFI.

i am with you mate

..premium for the 12
usually Mobil or BP stuff

fuel is interesting as a topic
my..aaah computer enhanced V8 Commodore
jumps 8kw at the wheels when i use
premium over the std stuff..but not a kilowatt
more if I use Hi-Octane unleaded

contrast that to 20 years ago
a Torrie I had back about then
made 30 odd hp more at the back wheels
when I used Avgas rather than Super
..leaded of course
smelt beautiful (anyone remember Castrol R..?? )
and gave me 4 10ths at Calder..to a 12.1
so
gotta be happy with that

cheers

Smitty

Smitty wrote:contrast that to 20 years ago

Smitty

im suprised u can remember back that far!

is there any benefits from using 100 octane? i just use 98 on my zx6 but have yet to try 95. might give 95 a go just to see what happens

I only use BP ultimate......
because my riding mentor told me to!

Mick C wrote:I use high-octane in the 10 because that is what it is designed to take.

Besides the 10 isn't used on a daily basis either so the dearer price doesn't bother me

there is a label on my ZX-636, recommended use of 95 Gasoline ONLY. has anyone tried to use regular unleaded on the 6?

Mick C wrote:

Stereo wrote:

Mick C wrote:I use high-octane in the 10 because that is what it is designed to take.

You talking about 100 octane? Im pretty sure the 10 is made for 97 octane, rather than 100 octane...

Nope, the 98 stuff...I took the poll to be referring to Unleaded(93), Premium(95) and High-Octane(98 ). The 10 is designed to take a minimum of 95, so for 98 is playing it safe. It is a much more highly tuned engine than a GPX250 or the Z650+.

....and don't make me pull out my graph of my logs showing fuel economy versus octane rating used

I'm pretty sure ULP is 91RON.

And, I found when I have my GPX250, that the higher the octane, the worse the economy was - 91 was marginally better.

Oh, and I have used 98 octane in mine for a couple of tanks, and used some Caltex Vortex (From a Safeway Petrol) and hardly noticed a difference......mind you this was only commuting in mainly stop/start traffic.

Scottatron wrote:...I'm pretty sure ULP is 91RON...

Yeah, I remembered that later on but couldn't be stuffed fixing it up

I use 98 mostly, but will stick some 95 in if i'm stuck. 91 in the carby bike is OK at a pinch, but with the EFI bikes I have had, they all pre-ignited madly on anything under 95! The 636 the Hornet and now the BM Trouble U all benefit from running on at least 95, and the BM Trouble you runs much better on the 98 than anything else! It stops it pining it's head off at low revs.