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Discussion in 'Engine Compartment' started by prasanthcr, Nov 12, 2010.

  1. prasanthcr

    prasanthcr

    Messages:
    5
    Trivandrum
    high speed Diesel fuel for Punto...good or bad

    Is it really bad if we use high speed diesel for punto, most of the people say high speed diesel is much more refined and has less sulphur content, not sure whtr its true...so as its much more refined it will give more mileage and keeps the engine much clean and better...but in the manual its mentioned not to use such fuels...
    Can anyone help me in this topic..isit really bad if we use high speed diesel...
  2. amogh

    amogh Staff Member Janitor

    Messages:
    1,377
    Pune
    Grande Punto 1.3
    Re: high speed Diesel fuel for Punto...good or bad

    I am not so sure about the less sulphur content part. High speed diesel has extra additives added into it.

    Using normal diesel (but from a good bunk - of good quality) has not harmed any of us till date. So I don't see any reason why we should pay more for high speed diesel. The benefits (if any) don't outweigh the costs !! Stick to normal diesel.
  3. karan desai

    karan desai Superiore

    Messages:
    805
    Morbi, Gujrat
    Re: high speed Diesel fuel for Punto...good or bad

    the reason they advice to avoid premium fuels is because premium diesel has more octane rating than normal. and since the engine is tuned for normal fuel one should stick to it as advised.
  4. prasanthcr

    prasanthcr

    Messages:
    5
    Trivandrum
    Re: high speed Diesel fuel for Punto...good or bad

    ok ...thanks amog and karan, one more thing is tht true if we use high speed diesel, we get more mileage...?
  5. sanjay_mugur

    sanjay_mugur Timido

    Messages:
    23
    Bangalore
    Re: high speed Diesel fuel for Punto...good or bad

    its cetane for diesel, octane is for petrol....
  6. amolmane

    amolmane Guest

    Re: high speed Diesel fuel for Punto...good or bad

    There is no any relation between premium fuel & Cetene / Octene No.
    Premium fuels contains only additives.

    Octene No.is used to fix the Anti-knock charactristic of Petrol ( How slow petrol is burnt)
    Cetene No. is used to fix burning speed of diesel (How fast diesel is burnt)

    Petrol has octene No. Petrol having higher Octene , burns slowly & smoothly.So high octane petrol prohibits premature ignition (before firing from Spark Plug) So Engine knock is avoided by using higher Octene No. Petrol

    In Diesel engine,there is Cetene No.

    Higher the cetene No.more fast combustion is there.
    Means euro 3 OR euro-4 diesel burns more fastly as compared to Euro-2 diesel.Multijet requires diesel of min.51 Cetene No. Means Multijet requires Euro-3 Or Euro-4

    So Euro-2 Diesel (48 Cetene No.) was not compatible when Multijet was launched.

    Octane Or Cetene No.is fixed in all type of fuel i.e. in regular Or Premium fuels.

    So don't make misunderstanding that,premium fuels has higher octane/Cetene No.

    Let's see the annexed PDF file & go to page No.6 & 7

    From
    amolmane

    Attached Files:

  7. royj

    royj Esperto

    Messages:
    1,306
    Trivandrum
    Re: high speed Diesel fuel for Punto...good or bad

    This is good information amolmane.
    This is true, however I know Bharat Petroleum had introduced a higher octane petrol variant some time back and was priced higher than the premium petrol 'speed'. Not sure whether they still have it.
  8. amolmane

    amolmane Guest

    Re: high speed Diesel fuel for Punto...good or bad

    To increse Octene No.petro company adds heptane in it.
    Heptene is a chemicle to maximise Octene index of petrol.
    Petro companies recovers the cost of additives added in fuel
    That is why premium fuel are costly.

    FIAT has advised to avoid premium fuel,especially premium diesel
    because premium fuels have tendancy to deposit gum in precise holes of precise Electronic fuel injectors of multijet engine.
    1 person likes this.
  9. Kiirus

    Kiirus Guest

    Re: high speed Diesel fuel for Punto...good or bad

    Best diesel after all tests according to us Indianoil regular.

    The reason why the manufacturer doesnt want you using the high octane / centane fuel is because it burns hotter and produces xtra heat at combustion. Its good quality fuel, but your car engines are retarded for lower power delivery and all the extra heat produced is rather not consumed but causes wear and tear over time.....that would mean a few years, 2-3 atleast! Alternatively, if your car is tuned, Xtra mile is good to use.


  10. amolmane

    amolmane Guest

    Re: high speed Diesel fuel for Punto...good or bad

    I repeat

    premium fuels have tendancy to deposit gum in precise holes of precise Electronic fuel injectors of multijet engine. So avoid use of premium fuel.
    See owner's manual of GP & Linea

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