bp 98

[Cuban]

i put some of that hi octane bp 98 in the tank the other day, and i dunno, but i swear it made a noticeable difference over the 96, bike just seemed all round quicker, anyone else noticed this at all?!

and has anyone seen the new actionman bike extreme ad(vs gangreen, i believe), that bike looks bad!!

[Gixxer]

I used 98 on Sunday, seems to have made a bit of a difference, felt a bit smoother, did not notice any power changes, only prob is that BP seem to be the only ones selling it. might have to make the change to 98.

[wari]

I use Gull 96 ... which is actually 97 ... and I reckon I get further on a tank ... maybe I'm dreaming too.

[boris]

I know in my car i get about 50km more on a tank full(50L tank)) . But on my Bike i find no diiff at all that I can tell any way.

boris

[Coldkiwi]

I'm a firm Gull 96 supporter for two reasons
1) the fuel is cleaner and as you said Wari, its better then a straight 96 octane
2) BP are top at my list of wankers. Everytime there is a price hike, BP start it.. normally around 3 or 4 cents... and then when the othercompanies decide to raise theirs, it is ALWAYS one cent lower and filthy BP have to reduce theirs. The pricks made LUDICROUS profits ($13B enough?) in ONE quarter alone last year and they're still pushing the prices.
and while I'm on a rant ... 'Beyond Petroleum".. yeah, my ass! When was the last time you saw BP putting geniune R&D money behind solar or Water powered cars!?

[Skunk]

Mobil synergy 8000 is 98 oct.

[bluninja]

Scuse me...but how does putting a higher Octane fuel into your tank change anything ? The octane number just denotes how resistant the fuel is to detonation (exploding in the cylinder rather than burning damn fast) and doesn't change the energy content of the fuel.

Great if you have high compression ratios, or an engine tuned/designed to use higher octane, otherwise seems a waste of money to me. Suppose it makes the engine run smoother on hot days (when you may start getting occasional detonation in lower octane fuels).

TTFN

[Gixxer]

unknown, but from what I have heard from a lot of bike stores, it is ment to be good when running high performance bikes.

any mechanics out there that can answer this?

[wari]

I dont know about the technicalities of this ... alL I know is the experience tells me Gull 97 seems to perform better in my bike.

[SPman]

How come all the bike shops recomend running 91??????

[Gixxer]

what stores are they?

I think it depends on who you talk to, or what you are asking.

[Coldkiwi]

"Run it on 91"? Thats news to me!

My understanding was that in Japan, you cannot actually buy 91 octane petrol (but I only heard this from one source so it would be worth verifying!). But of course the upshot to this is that all Japanese bikes should be being 'designed' to run on 96 (although I'll admit I don'tknow enough about perfromance bike engine design to be able to offer any useful info on what this really means).

But the proof is in the pudding! I certainly noticed a difference going to 96 from 91 on my bike. Whether its quite as noticable on a bike like an RSV with that much power I dunno! (but I'm itching to find out one day!)
:bigthumb:

[bluninja]

Don't make much difference on an SV650...I tried it at the racetrack. One SV on 91, one on 96. No difference on acceleration down the straights side by side. Even when I switched my bike over to 96 it didn't change things. Perhaps if I were a more skillful rider I would go fast enough to notice

TTFN

[bikerboy]

This is my very basic understanding of octane ratings: Octane is inherent in the chemical structure of hydrocarbons (big word)in gasoline. Higher octane levels equal more efficient engines, not more power. Modern engines have management systems which adjust for a range of octane levels as long as the minimum design level is met(generally 91). The lower the octane in the design range, the less efficient the engine runs (knocking and poor fuel economy). High performance engines are designed with a higher minmum in mind. High octane = expensive refining costs.

Ratings of octane are very complex and take into consideration other additives and prevent " pre or post" ignition of fuel in the combustion chamber, and are based on specific engine load and driving characteristics. This why some notice a difference and others don't. Different companies and different countries = different octane/additive results based on "same octane ratings"(altitude, humidity, season, etc.).

Best advice: Try several brands of differing octane levels to find best running of your bike for your riding and use that. It may mean 98 octane or 91 is best. Remember the less octane gasoline has the cheaper it is to produce and the less it cost you.

[bluninja]

Bikerboy, octane has absolutely nothing to do with thermodynamic engine efficiency, it as as said earlier a rating of the fuels ability to withstand detonation (and preigniton...which I didn't say )

I agree that different fuel companies will provide gas that may make more power even though they show the same RON, so yes shopping around and seeing what fuel works best in your engine is a good idea....but going up to a higher octane level will not boost power output for a bike designed to operate at 91.

Here's a shortish article that may help The 4 Basic Qualities of Fuels

TTFN