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PULP Fiction - Premium Fuel or What????

Discussion in 'General Motorcycling Discussion' at netrider.net.au started by wallyt99, Mar 22, 2008.

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  1. I know...I know...... We've been through this 1 million times, but I seriously think everyone has it wrong.

    Most bikes would run better on normal ULP!

    Higher octane actually requires a higher temperature/compression factor in order to explode. This means that a bike idling, or working at low revs may actually not achieve 100% burn, and at higher revs the spark may be slower to start reducing response.

    Great for high compression, high performance car engines... not so great for bikes.

    Secondly, PULP is no where near as popular as regular ULP, and for those who don't know Petrol has a shelf life. PULP that has been sitting in the tank at the servo for 2 months is going to be exactly the same as the fresh ulp.

    My 2 Cents.

    (I will concede however that PULP can allow engines/plugs to stay cleaner)
  2. :roll:

    I have a high compression bike. :-k

    Can I send you the bill when my bike carks it for applying your advice?? :?

    Now what Wally?
  3. I run BP ultimate in all my cars and my bike. My turbo car absolutely requires it, but even with "normal" cars i find it gives better fuel economy and offsets the slightly higher cost anyhow. However to be honest i haven't tried running normal ULP in the bike, yet. I might give it a go and see how it goes. Everyone seems to have a different opinion when it comes to what fuel is "best". I guess it sort of just comes down to trial and error using the "butt dyno". lol
  4. the difference between cleaning carbs on a bike runing on regular, and one running on premium is enough alone to keep me paying the extra 7 cents a litre.
  5. I also have a high compression bike. Would you like to buy a new piston and rings kit for me? I didn't think so. OK So let's go through the details...

    This is a misused truth. Your engine is designed to BURN petrol, not to
    explode/detonate it. If you use low-octane petrol in an engine which
    requires higher octane, you can hear a rattle/knock/ping sound from
    the motor when loaded at low rpm's. This sound is the sound of the
    petrol exploding/detonating instead of burning in a smooth controlled
    way. It is also the sound of those explosions chewing away at your
    expensive motor parts causing damage. Extreme or prolonged cases
    of detonation or "pinging" due to low-grade fuel will result in head
    damage, pistons burnt through, valve damage, etc.

    The flame velocity, or the rate at which the flame travels through
    the combustion chamber, depends on many factors such as mixture,
    temperature, spark power, compression, but NOT on octane rating.

    Yes petrol has a shelf life, however it is usually refreshed pretty well
    in all city and regional and highway fuel stations. Only outback and
    very slow-turnover stations will suffer.
    A typical metro service station will 90% refill their PULP tanks once per
    week. That's how popular it is.
    If you're at a low-turnover station in the middle of nowhere, the PULP is
    still likely to be higher quality as it started higher quality.

    The highest performance (horsepower-per-capacity) production engine in the world, is a motorbike. (Yamaha R6 2008). Coincidentally, it is also
    the highest compression production engine in the world (over 13:1).
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