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  1. Join Date
    Aug 2004
    Posts
    237
    #1
    tanong ko lang, ano difference ng regular unleaded sa blaze (petron). mas tipid ba ang blaze? thanks in advance :D

  2. Join Date
    Jan 1970
    Posts
    512
    #2
    Higher ang octane rating ng blaze.. if your engine can run on normal unleaded, then waste of money yung blaze.

  3. Join Date
    Jun 2004
    Posts
    508
    #3
    only those w/ O2 sensor will benifit from high octane figure..hehe..>>

  4. Join Date
    Oct 2002
    Posts
    14,825
    #4
    from www.howstuffworks.com

    What does octane mean?


    If you've read How Car Engines Work, you know that almost all cars use four-stroke gasoline engines. One of the strokes is the compression stroke, where the engine compresses a cylinder-full of air and gas into a much smaller volume before igniting it with a spark plug. The amount of compression is called the compression ratio of the engine. A typical engine might have a compression ratio of 8-to-1. (See How Car Engines Work for details.)

    The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.

    The compression ratio of your engine determines the octane rating of the gas you must use in the car. One way to increase the horsepower of an engine of a given displacement is to increase its compression ratio. So a "high-performance engine" has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight -- that is what makes the engine "high performance." The disadvantage is that the gasoline for your engine costs more.

    The name "octane" comes from the following fact: When you take crude oil and "crack" it in a refinery, you end up getting hydrocarbon chains of different lengths. These different chain lengths can then be separated from each other and blended to form different fuels. For example, you may have heard of methane, propane and butane. All three of them are hydrocarbons. Methane has just a single carbon atom. Propane has three carbon atoms chained together. Butane has four carbon atoms chained together. Pentane has five, hexane has six, heptane has seven and octane has eight carbons chained together.

    It turns out that heptane handles compression very poorly. Compress it just a little and it ignites spontaneously. Octane handles compression very well -- you can compress it a lot and nothing happens. Eighty-seven-octane gasoline is gasoline that contains 87-percent octane and 13-percent heptane (or some other combination of fuels that has the same performance of the 87/13 combination of octane/heptane). It spontaneously ignites at a given compression level, and can only be used in engines that do not exceed that compression ratio.

    During WWI, it was discovered that you can add a chemical called tetraethyl lead to gasoline and significantly improve its octane rating. Cheaper grades of gasoline could be made usable by adding this chemical. This led to the widespread use of "ethyl" or "leaded" gasoline. Unfortunately, the side effects of adding lead to gasoline are:

    Lead clogs a catalytic converter and renders it inoperable within minutes.
    The Earth became covered in a thin layer of lead, and lead is toxic to many living things (including humans).
    When lead was banned, gasoline got more expensive because refineries could not boost the octane ratings of cheaper grades any more. Airplanes are still allowed to use leaded gasoline, and octane ratings of 115 are commonly used in super-high-performance piston airplane engines (jet engines burn kerosene, by the way).

  5. Join Date
    Aug 2004
    Posts
    22,705
    #5
    New vehicles, unless designed for a high-octane diet, will run fine on unleaded.

    Older vehicles, both carburated and EFI, may benefit from using high octane Blaze, as they often have deposits and build-up that hurts engine performance. Higher Octane gasolines have better detergent properties and can help clean up old systems.

    Some really old carburated vehicles may run on nothing BUT high octane. They may start knocking if you use weaker gas (lower octane gas is more prone to detonation... exploding before the spark) because of inefficient design.

    Contrariwise, some new EFI vehicles will lose power unless you use high octane. This is especially true of Mitsubishi Evos. The computer automatically retards the timing (lowering power by quite a bit) if it detects knocking.

    Most cars though, are happy with modern premium unleaded. An occassional tank of Blaze or Velocity to help keep them clean won't hurt, but is not really necessary.

    Ang pagbalik ng comeback...

  6. Join Date
    Aug 2004
    Posts
    237
    #6
    thanks sa reply ang napansin ko kasi sa regular unleaded parang lag ang dating kapag nagshift ng gear (matic kasi ako) pero nung nagtry ako sa blaze may lag pa rin pero mas smooth na siya compare dati. almost 2 years na ko gumagamit ng regular unleaded, ngayon lang ako gumamit ng blaze. tingin nyo? balik ako sa regular or blaze na?

  7. Join Date
    Oct 2002
    Posts
    11,355
    #7
    i think mas tipid ang blaze if you dont drive hard. if your pocket can afford the extra cents to purchase blaze, then why not diba?
    Last edited by ssaloon; September 7th, 2004 at 01:55 PM.

  8. Join Date
    Oct 2002
    Posts
    13,415
    #8
    bale wala yung tipid kasi mas mahal sya, if kinompute mo ganun din.

  9. Join Date
    Oct 2002
    Posts
    4,388
    #9
    gumamit na rin ako ng unleaded dati ok naman. pero sabi ng erpat ko ung mga high octane daw karga ko o kaya ung premium. kaso mahal na nga gas ngayon e. so ok lang palakahit unleaded na lang lagi ko karga.

  10. Join Date
    Aug 2004
    Posts
    22,705
    #10
    Actually, I have noticed that some older cars drive better on blaze (this is SUBJECTIVE, mind you...) and that they get better mileage, too.

    I usually use unleaded, though... but with rising gas prices, the percentage of difference in the price of blaze and regular unleaded is almost laughable... give it one more year, and you won't be able to tell the difference... they'll all be expensive!

    Ang pagbalik ng comeback...

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