Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

5.7ltr SS - premium unleaded v unleaded???

Discussion in 'General' started by VZ SS :D, Jun 19, 2009.

  1. VZ SS :D

    VZ SS :D New Member

    Messages:
    28
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jun 19, 2009
    Members Ride:
    VZ 5.7 SS
    Just bought a VZ 5.7ltr SS pretty sure the bloke before me didn't run premium. Should I?? How much does it affect; Economy? Power? Better for engine? etc.
     
  2. LowVZ

    LowVZ New Member

    Messages:
    41
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jun 19, 2009
    Members Ride:
    Vz ute
    i know this off track,
    but i run 98 octance in my v6 all the time.
    runs alot better on it.

    My dad runs 98, in his VX SS, same thing. Goes harder
     
  3. VZ SS :D

    VZ SS :D New Member

    Messages:
    28
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jun 19, 2009
    Members Ride:
    VZ 5.7 SS
    Worth the extra $$?
     
  4. alien

    alien New Member

    Messages:
    913
    Likes Received:
    17
    Trophy Points:
    0
    Joined:
    Nov 5, 2008
    Location:
    Tullamarine, Vic
    Members Ride:
    03 VY Supercharged 3.8L
    I reckon extra is. My L67 loves Mobil 8000 fuel. Even increased my throttle response over other fuels :) And helps keep the engine clean :) Burns better too. That and a CAI is all i did to get a 0-100 time of roughly 7 seconds (still yet to actually time it again and get exact figures).
     
  5. VZ SS :D

    VZ SS :D New Member

    Messages:
    28
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jun 19, 2009
    Members Ride:
    VZ 5.7 SS
    Any other advice??
     
  6. johnvtls1

    johnvtls1 New Member

    Messages:
    1,063
    Likes Received:
    5
    Trophy Points:
    0
    Joined:
    Sep 5, 2007
    Location:
    Melton,Victoria
    Members Ride:
    E92 BWM 335I
    yeh i run nothing but 98. you will get away with the standard stuff but i think the manual says 95 is minimum? not 100% sure on that so dont quote me. for the average car it shouldnt really matter, but once the car is tuned for 98 it will only work well with 98.
     
  7. DanVN

    DanVN Cruizin' in style!

    Messages:
    246
    Likes Received:
    4
    Trophy Points:
    0
    Joined:
    Nov 16, 2007
    Location:
    Western Suburbs, Vic
    Members Ride:
    01 WH Statesman International 5.7L
    i Run 98 75% of the time, usually switch it up every 3rd time and use normal unleaded.. seems to get more mileage out of the normal and premium tanks when i do it.
     
  8. Drewie

    Drewie Active Member

    Messages:
    987
    Likes Received:
    46
    Trophy Points:
    28
    Joined:
    Jul 9, 2005
    Location:
    East of Melbourne
    Members Ride:
    VX SS (Original owner).
    I run 98 in my VX SS which is stock apart from a cat back exhaust, I mainly run it for the supposedly cleaner burning, the detergent package is supposedly meant to keep the injectors etc cleaner. My VX runs great on it, but I have been in the country where 98 has not been available and thrown in the odd take of 91 or 95 and had no dramas.
    With the VX V8 the recommendation in the Holden handbook is 91 octane.
     
  9. LowVZ

    LowVZ New Member

    Messages:
    41
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jun 19, 2009
    Members Ride:
    Vz ute
    Yeah id defo be using it every third tank or so.
    just to clean it out if u cant be botherd or afford it every time.
     
  10. Lumps of cheese

    Lumps of cheese welcome to the machine

    Messages:
    2,770
    Likes Received:
    37
    Trophy Points:
    48
    Joined:
    Nov 19, 2005
    Location:
    Warrnambool
    Members Ride:
    83 vh sle, 4x4 hilux, 03 monaro, 07 nightrain
    I run nothing but 98 in mine but it's been tuned so to get the best out of it i run the 98. Beforehand i ran 95 without any probs and the economy was pretty good.
     
  11. SimoVXSS

    SimoVXSS New Member

    Messages:
    23
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Mar 19, 2009
    Members Ride:
    VX SS
    98 is all i use, didnt matter what the car was.

    Its a cleaner fuel, burns more effeciently and better for your engine. Worth the extra $3-$5 IMO
     
  12. VZ SS :D

    VZ SS :D New Member

    Messages:
    28
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jun 19, 2009
    Members Ride:
    VZ 5.7 SS
    Well gone through a few tanks of both 98 and 91 fuel and to be honest i cant tell any difference, maybe a little in kms/tank but might just be from different driving.
     
  13. CANYONERO

    CANYONERO Likes Cheese...

    Messages:
    1,028
    Likes Received:
    10
    Trophy Points:
    38
    Joined:
    Mar 29, 2006
    Location:
    Country SA
    Members Ride:
    V8 6spd wif MOMO leavaa.
    i only run mobil 8000 or BP ultimate in the Vy, there the only fuels i use in it unless i go back home ( small country town) with a liberty or shell. so i only put in enough to get me to the nearest BP and fill up. i think its worth the bit more but usually my car sits in the shed most of the week and only used on weekends, i got gas in my daily for the grind to work an i put in whats easiet to get.
     
  14. Lumps of cheese

    Lumps of cheese welcome to the machine

    Messages:
    2,770
    Likes Received:
    37
    Trophy Points:
    48
    Joined:
    Nov 19, 2005
    Location:
    Warrnambool
    Members Ride:
    83 vh sle, 4x4 hilux, 03 monaro, 07 nightrain
    Has it been tuned?
    You won't really notice the difference until your car has been tuned. Most tunes are set up to run specifically on 98 or in some case 95. Since my tune i've ran 98 all the time and the difference in economy and proformance is quite noticable.
     
  15. VZ SS :D

    VZ SS :D New Member

    Messages:
    28
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jun 19, 2009
    Members Ride:
    VZ 5.7 SS
    Na not yet, I plan to get one though
     
  16. cpbait

    cpbait New Member

    Messages:
    1,075
    Likes Received:
    6
    Trophy Points:
    0
    Joined:
    Jul 8, 2006
    Members Ride:
    vy ss commodore 5.7ltr
    the difference between 91 and 98 is about 3% in power difference and economy, they are set up to run both from factory, obviously 98 will be a bit better, this is what i was told and shown on a efi performance course i did, i personally use 98 about 99% of the time, have put 91 in to see the difference and for the extra couple of dollars the 98 is worth it, i got better economy and felt better out of it, have used 95 before and didn't notice a real difference between 95 and 98.

    i use shell 98 and if just a little top up will put 91 in, have just put carltex 98 in this week.

    my trade school teacher said you can use 91 during the week and will be fine and put 98 in on the weekend for a bit of fun :D
     
  17. Brail

    Brail New Member

    Messages:
    6
    Likes Received:
    0
    Trophy Points:
    0
    Joined:
    Jan 13, 2010
    Location:
    DEAN PARK
    Members Ride:
    vx executive s2
    I have run a two month test on this very topic using 95 for a month and then using 98 for the following month. My car hasn't been tuned specifically for either fuel and what i found was that for the price difference in the fuel compared to the difference in mileage gained from the higher octane fuel the difference is very very small. 98 won the battle but you could really call it a tie. I quess it comes down to having the benefits of cleaner burning fuel and less engine wear from the 98.
     
  18. rb26dett

    rb26dett New Member

    Messages:
    1,290
    Likes Received:
    9
    Trophy Points:
    0
    Joined:
    Aug 22, 2005
    Members Ride:
    VT SS S2 A4
    Just use regular unleaded until you get the tune.
     
  19. coolvxss

    coolvxss New Member

    Messages:
    718
    Likes Received:
    3
    Trophy Points:
    0
    Joined:
    Apr 29, 2006
    Location:
    canberra
    Members Ride:
    5sp VN Executive1988, VX SS 6sp
    My car is stock, and have tried both fuels and cant notice a difference
     
  20. DevilDRake

    DevilDRake Braaaap

    Messages:
    1,161
    Likes Received:
    60
    Trophy Points:
    48
    Joined:
    Oct 14, 2009
    Location:
    Skye
    Members Ride:
    2006 VZ SS 6L Ute
    My shitty 1997 Hyundai excel sprint, after going from 91 to 95, it makes a pretty noticeable difference.
     

Share This Page