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Thread: Which Petrol..For new bike?

  1. #11
    Addicted rags's Avatar
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    Quote Originally Posted by mempheS.D View Post
    Unleaded petrol from a reliable pump as Shell.
    Well in Bangalore normal unleaded petrol at Shell is about Rs. 4 more than the other pumps. Last time decided to use HP instead.

    Quote Originally Posted by mempheS.D View Post
    As per my mechanic, high octane fuels burn at a higher temperature than Unleaded. Indian bike engines are not built to quite withstand that temperature safely. Plus, you'd never find ONE ad which suggests you use high octane fuel on an Indian bike!!

    Why risk it? The company manual would tell you the same. Unleaded.
    Fuels have activation energies and if the compression is high enough that it can provide energy higher than the activation energy and lead to autoignition which is something you don't want to happen inside an engine. Octane ratings indicate the ability of the fuel to withstand autoiginition, the higher the octane rating the more resistant it is to autoignition. The octane rating of a fuel is usually boosted by additives which raise the activation energies but it doesn't change the energy content of the fuel so I'm not sure if the mechanic is right in saying that that higher octane fuels burn at higher temperatures.

    None of the Indian bikes have compression ratios that would warrant higher octane fuels than the normal unleaded which is about RON 90. BTW the premium petrols we get are not higher in octane rating but the same unleaded with additives which are supposed to boost engine performance (higher octane fuels don't boost engine performance, they allow for higher compression).
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  2. #12
    Rookie agnivo007's Avatar
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    So it turns out to be that using normal unleaded petrol is the cheaper, better and safer bet?
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  3. #13
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    Bikes in India use low compression ratio so normal fuel is just perfect.
    we don't really need a premium fuel in our bikes,
    they don't rev high, used for city commutes mostly, low end power is not great.

    Stick to normal fuel.

  4. #14
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    I heard somewhere that petrol from BP pumps are more reliable. Well i use speed in my p220 and its good i guess. Any fuel won't harm your machine so you can just try out and experience yourself if you are picking up any change. feed your baby the best it can digest and make use of it.
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    Use normal unleaded petrol.
    Premium isnt really meant for bikes. Besides there is no significant change observed in case of premium petrol except for the cost difference.

    But always be alert while filling petrol at a petrol pump. Some people try to act smart and fool you with the meter. Dont let urself get distracted.

    Drive safe.

  6. #16
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    Older bikes cannot and should not use premuim or speed as additives contain ethylene and complex hydrocarbons which degrade the non metallic parts of the fuel system and do not help or affect the performance of the engine... the newer bikes, the ones after these fuels were introduced, I think it was in 2004? are much better suited for these fuels, it does keep the engine clean and carbon-free and increases the average slightly but not worth the extra bucks in my opinion... even if once u use normal unleaded, the benefits of using the premuim/speed are erased...
    If u want the benefits then u have to use these fuels all the time and spend much more

  7. #17
    Addicted Zamaan's Avatar
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    I really feel a difference, shell fuel surely increases mileage by 20% in my bike ! But the performance is better of when I use Indian oil fuel ! I can easily touch 112 on the same road when I fill Indian oil, by filling in shell 105 is max. ! Moreover wheelies are really easy with Indian oil petrol where as I kind of struggle doing it on shell petrol ! I thought this was psychological but no, I tried i out and same with my group of friends !
    Last edited by Zamaan; 08-17-2010 at 11:12 PM.
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    Addicted venomafiax's Avatar
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    Lets make it very clear here!!!

    i own a yamaha FZ-s too... t we do have the Indian IOC petrol sheds here as well... when you say Xtra Premium i hope you mean ""octane 90 Premium" Because petrol is classified under the octane levels... you find octane 90, 95, 100 ,105... the digits indicate the level of octane in the fuel mixture.
    TO make it clear... normal petrol is octane 90... and IOC's Xtra premium is also the same octane level (90) you'll have to watch carefully at the petrol sheds if its octane 90 (how you identify is the octane 90 and 90 premium pumps will be in the same row or the prices will be slightly higher compared to normal petrol)

    Likewise you find the same case in octance 95 as well... u find the normal 95 and the extra premium 95 as well.. (the number is not indicated though in the extra premium, but u identify it by the label colour or the price compared to octane 95 which cost much more than 90).

    the difference between 90 and 95 is that the 95 mixture is more richer in octane compared to the 90 and also like said in the above posts the compression ratios.... engines below 2500cc are fine with using octane 90 fuel.

    *** dont confuse yourself thinking that normal petrol is octane 90 and extra premium is higher octane (95),..Wrong!!! extra premium if the price is slightly above the normal is octane 90 aswell...its just that EXTRA PREMIUM IS MUCH MORE CLEANER AND HAS FRICTION BUSTERS WHICH MAKE ENGINE MOVEMENT AND COMBUSTION SMOOTHER.... its not a Marketing gimmick... thats why they say premium..ITS CLEANER AND GOOD FOR THE ENGINE***

    On my FZs i use the extra Premium (90) most of the time... and to be honest there is a difference the engine and performance is very smooth and there is less exhaust sound its much more quiet and the friction busters really work, also on the other hand when the Premium runs out i use the Normal petrol and i notice that the ride is a bit harsh, exhaust sounds louder and everything is just different... its just not smooth and also when you inhale the smell from the exhaust it smells stronger.

    the other day for fun i used octane 95 ... and there was an even bigger difference i had the best mileage ever and pickup was just awesome at every traffic light by bike will just lift up when i take off from 1st gear... its because the octane is higher and thicker the fuel capacity used does more milage and performance is SUPERB!!!!

    Conclusion: ---> from my experience... extra premium is very good if you keep using it... you wont know the difference unless u continuously use it for more than 2-3 refills.. and trust me those friction busters extend the life of your ride quality, maintenance and engine and the Premium petrol is just so much cleaner and it is NOT a marketing gimmick it does work if you keep using it.

    Guys correct me if ive mentioned anything wrong above.
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  9. #19
    Rookie CTCT's Avatar
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    Default Bike Fuel

    I use ony Indian Oil...
    Xtra premium on old Apache, its good for engine

  10. #20
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    just stick to a quality, reliable petrol bunk which YOU trust..... there are lot of difference between normal petrol n premium ones. at least i feel the difference. try shell super u will definitely feel a difference.



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