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  1. Join Date
    Jan 2009
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    6,467
    #21
    The premium part is mostly just having a better additive package and maybe a bit more cetane. That said, it is all relative. In other words, regular Diesel is not bad. Premium is just better. It doesn't matter if it's a jeepney or an Audi, regular vs premium doesn't necessarily matter. Like I said earlier, use the correct EURO standard fuel for the vehicle and you'll be fine.

    Don't overthink it or it will just drive you nuts. By the time your choice of regular vs premium fuel comes into play, you've most likely have sold your vehicle.

  2. Join Date
    Oct 2013
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    #22
    Quote Originally Posted by oj88 View Post
    The premium part is mostly just having a better additive package and maybe a bit more cetane. That said, it is all relative. In other words, regular Diesel is not bad. Premium is just better. It doesn't matter if it's a jeepney or an Audi, regular vs premium doesn't necessarily matter. Like I said earlier, use the correct EURO standard fuel for the vehicle and you'll be fine.

    Don't overthink it or it will just drive you nuts. By the time your choice of regular vs premium fuel comes into play, you've most likely have sold your vehicle.
    under construction/renovation yung caltex sa marcos alvarez las pinas, nag dadagdag sila ng underground na tangke, para daw sa "SUPER Diesel", balik tayo sa tanong na sino ba ito mga sasakyan na nangangailangan ng premium diesel kase kaya sila mag bebenta kase may "need/demand"

  3. Join Date
    Jul 2013
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    7,381
    #23
    Quote Originally Posted by Stigg ma View Post
    sino ba ito mga sasakyan na nangangailangan ng premium diesel kase kaya sila mag bebenta kase may "need/demand"
    same question. anong local car ba ang nangangailangan ng premium diesel?

  4. Join Date
    Jul 2013
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    #24
    ^ok update.

    did some quick reading. higher cetane rating which cleans the engine.

    ako din naman. twice a year kapag may out of town trip, gumagamit ako ng 97 Octane na gas... baka nga naman nakakalinis ng engine kahit papano.

  5. Join Date
    Mar 2008
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    #25
    it will just clean the engine a bit, that's all.
    some authors recommend a tankful every 6 months.
    it has no significant effect on engine performance or km/li figures, daw.
    Last edited by dr. d; October 4th, 2022 at 05:28 PM.

  6. Join Date
    Oct 2013
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    #26
    Quote Originally Posted by ice15 View Post
    ^ok update.

    did some quick reading. higher cetane rating which cleans the engine.

    ako din naman. twice a year kapag may out of town trip, gumagamit ako ng 97 Octane na gas... baka nga naman nakakalinis ng engine kahit papano.
    sa gasoline engine madami na nagawa pag aaral dyan kase yan ang ginagamit ng USA, wala epek ang higher octane sa low compression engine lalo na naka bantay lahat ng sensors ng ECU, waste of money lang ang high octane sa mga sasakyan na di naman performance cars (high compression)

    sa diesel naman meron high compression ratio na 14:1 to 22:1

    sa 1gd-ftv ang compression ratio lang niya ay 15.6:1, so hindi ito yung nangangailanan ng high cetane. ano kaya yung diesel na super high compression???

    ang land cruiser 1vd-ftv (v8) diesel 16.8:1
    Last edited by Stigg ma; October 4th, 2022 at 05:25 PM.

  7. Join Date
    Jan 2007
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    #27
    Quote Originally Posted by Stigg ma View Post
    sa gasoline engine madami na nagawa pag aaral dyan kase yan ang ginagamit ng USA, wala epek ang higher octane sa low compression engine lalo na naka bantay lahat ng sensors ng ECU, waste of money lang ang high octane sa mga sasakyan na di naman performance cars (high compression)

    sa diesel naman meron high compression ratio na 14:1 to 22:1, sa 1gd-ftv ang compression ratio lang niya ay 15.6:1, so hindi ito yung nangangailanan ng high cetane. ano kaya yung diesel na super high compression???
    IIRC the old 4D56 in the L300 and boxtype to 2nd gen Pajero was 21:1

  8. Join Date
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    #28
    Quote Originally Posted by dr. d View Post
    it will just clean the engine a bit, that's all.
    some authors recommend a tankful every 6 months.
    it has no significant effect on engine performance or km/li figures, daw.
    yup. kahit naman sa car ko... walang naitutulong yung 97 octane.

    pero at least (sana) yung "cleaning properties" nya makatulong.

  9. Join Date
    Oct 2013
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    #29
    Quote Originally Posted by Dr.Kamiya View Post
    IIRC the old 4D56 in the L300 and boxtype to 2nd gen Pajero was 21:1
    mukang nahanap ko na ang sagot, isa ay ang isuzu mu-x na may compression ratio na 18.1:1

    isuzu trooper diesel compression ration 19.0:1

    yan talaga kailanan premuim diesel
    Last edited by Stigg ma; October 4th, 2022 at 06:03 PM.

  10. Join Date
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    #30
    Quote Originally Posted by ice15 View Post
    yup. kahit naman sa car ko... walang naitutulong yung 97 octane.

    pero at least (sana) yung "cleaning properties" nya makatulong.
    kung cleaning lang ay mas okay pa gumamit ng techron fuel additive every 5000 km kase yan proven na...

  11. Join Date
    Mar 2008
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    #31
    for the past 145K km, i have been filling up with the cheapest diesel fuel i can find.
    i still do not feel any unclean-engine symptom, naman.

  12. Join Date
    May 2014
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    #32
    Only tried to use Premium Diesel on the family's Montero maybe twice? in its whole life. It is now at 90k kms, 10.5 years old by my count.

    If it is about cleaning, I believe in the simple fact of using regular diesel, especially since we are now at Euro 4, Euro 5 if you are using Unioil Diesel which the Montero is using since it's 3rd year with us.

    About the cleaning, if and when you do have the car casa serviced, even as once a year at MMPC, they will give you as part of your PMS the diesel cleaner additive to put into your tank when you fill the car up, because that (using your preferred brand) at your "desired" interval, or if you notice the car is blowing out dark grey or "black" soot from your tailpipe. But I have not seen that happen on the Montero anymore ever since Unioil became Euro 5. Granted I don't do any Italian "tune ups" on it but I think, for the most part, it isn't as needed because it is using Euro 5 regular diesel.

    That's my take on the matter.

    Maybe Euro Diesels and Korean Diesels could have some benefit with premium diesels (but it seems like the 2.2 Crdi is around 16-17 only in compression ratio) so don't know.

    About the 1.9 Isuzu Dmax we have, we also use regular diesel only. But that's either seaoil or unioil, depending on route.

  13. Join Date
    Feb 2008
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    #33
    RSM suggested that I should use premium diesel on the X3. I will oblige for now since it is still under warranty for 5 years/200T km, whichever comes first.

    Sent from my SM-S908E using Tsikot Forums mobile app

  14. Join Date
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    #34
    Quote Originally Posted by Dr.Kamiya View Post
    IIRC the old 4D56 in the L300 and boxtype to 2nd gen Pajero was 21:1
    tama po. napasin ko with the advent of common rail diesels bumaba ang compression ration ng mga diesel engine nasa 15-16:1 range of there abouts. noon old school diesel it is more in the 20+:1.

    i sure the turbo neccesitated the lower ratio but i don't know what else baka kasi the fuel is highly pressurized na when injected to begin with.

  15. Join Date
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    #35
    Quote Originally Posted by Stigg ma View Post
    mukang nahanap ko na ang sagot, isa ay ang isuzu mu-x na may compression ratio na 18.1:1

    isuzu trooper diesel compression ration 19.0:1

    yan talaga kailanan premuim diesel
    is this for the isuzu 4rze?
    yung 4jj3 kasi is 16.3:1

  16. Join Date
    Oct 2013
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    #36
    "SUPER DIESEL" ang pangalan ng bago producto ng CALTEX, sa may edsa pasay meron na...

  17. Join Date
    Dec 2019
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    #37
    Quote Originally Posted by Stigg ma View Post
    "SUPER DIESEL" ang pangalan ng bago producto ng CALTEX, sa may edsa pasay meron na...
    Its "power diesel". They have it in caltex bf homes.

    They brought back that old branding from the 90s.

    Sent from my SM-S901E using Tsikot Forums mobile app

  18. Join Date
    Jan 2008
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    #38
    Sa crdi engines pansin ko less talaga usok sa premium diesel

  19. Join Date
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    #39
    Quote Originally Posted by thearsenal1205 View Post
    Its "power diesel". They have it in caltex bf homes.

    They brought back that old branding from the 90s.

    Sent from my SM-S901E using Tsikot Forums mobile app
    how does it differ from the usual diesel?

  20. Join Date
    Aug 2008
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    498
    #40
    Quote Originally Posted by dr. d View Post
    how does it differ from the usual diesel?
    It makes the user/driver feels his ordinary diesel engine will turn to super diesel engine. Placebo effect everytime .hehehehe

    Sent from my SM-A125F using Tsikot Forums mobile app

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