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95 Or 98?

Discussion in 'New A3/S3 (8V Chassis)' started by m2srt, Aug 26, 2014.

  1. m2srt
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    m2srt Member

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    [Aug 26, 2014]
    With the S3 not being your run of the mill car, is it better to run super unleaded? I know it shouldn't knock on 95 but is there a discernable difference between running on 98?
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  3. NotquiteWelsh
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    NotquiteWelsh Active Member

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    [Aug 26, 2014]
    #2
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  4. A3_Rider
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    A3_Rider Active Member

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    [Aug 26, 2014]
    Endless debate, research and threads. So I made a thread here and will be doing what the majority do (easier that way!)

    In terms of cost its something like £160 more a year over the normal fuel.
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  5. veeeight
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    veeeight I am a very pretty girl

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  6. Bristle Hound
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    Bristle Hound MODERATOR Staff Member Moderator

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    [Aug 26, 2014]
    Don't search just fill with Shell V-Power & enjoy :)
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  7. Pulp84
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    Pulp84 Well-Known Member

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    [Aug 26, 2014]
    :sign omg:

    Not another fuel thread!
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  8. cuke2u
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    cuke2u Well-Known Member

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    [Aug 26, 2014]
    Groan...
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  9. tankclark
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    tankclark Active Member

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    [Aug 26, 2014]
    My final thoughts are: spend 30k+ on a high end sports car and then try and save a few pence a litre on fuel? why
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  10. The Challinor
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    The Challinor Well-Known Member Regional Rep

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    [Aug 26, 2014]
    Momentum FTW!
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  11. Bristle Hound
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    Bristle Hound MODERATOR Staff Member Moderator

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    [Aug 27, 2014]
    Noooooooooooooooo :keule:

    Not Tesco sh1te :banghead:
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  12. steeve
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    steeve Well-Known Member

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    [Aug 27, 2014]
    Not the first to ask and you wont be the last....................................
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  13. P40ULW
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    P40ULW single and skint? how? oh cars!!! Regional Rep

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    [Aug 27, 2014]
    Thats what i use! and have done im many of my cars,
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  14. The Challinor
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    The Challinor Well-Known Member Regional Rep

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    [Aug 27, 2014]
    I'm really not getting into this
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  15. Gazwould
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    Gazwould Well-Known Member

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    [Aug 27, 2014]
    Had a map that exclusively has to use 98 ron minium.

    No det with the Momentum.
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  16. Bristle Hound
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    Bristle Hound MODERATOR Staff Member Moderator

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    [Aug 27, 2014]
    LOL ;)
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  17. veeeight
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    veeeight I am a very pretty girl

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    [Sep 18, 2014]
    .

    Note:


    Your particular car will only benefit if it has knock sensor(s), and can advance the iginition sufficiently to take advantage of 98RON. It will say in the handbook what fuel is recommended.



    #16
  18. cuke2u
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    cuke2u Well-Known Member

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    [Sep 18, 2014]
    Lol really scientific that and so impartial...
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  19. veeeight
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    veeeight I am a very pretty girl

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    [Sep 18, 2014]
    You're such a cynic ;)
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  20. tankclark
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    tankclark Active Member

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    [Sep 18, 2014]
    Here's the 5th gear one

    5th Gear - High Octane Fuels:
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  21. veeeight
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    veeeight I am a very pretty girl

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    [Sep 18, 2014]
    There's a much more recent fifth gear episode on this topic.
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  22. tankclark
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    tankclark Active Member

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    [Sep 18, 2014]
    Fifth Gear Fuel test:
    #21
  23. cuke2u
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    cuke2u Well-Known Member

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    [Sep 18, 2014]
    :D:jester: It's just all cars made today have anti-knock sensors, and they have variable valve timing as well..
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  24. veeeight
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    veeeight I am a very pretty girl

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    [Sep 18, 2014]
    Most cars will have knock sensors
    Most engine ECU's will have the instruction to Retard the timing when knock is detected

    Not all engines will have higher than usual compression ratios
    Not all engines will have ECU instructions to Advance the timing to take advantage of higher RON fuels
    #23
  25. cuke2u
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    cuke2u Well-Known Member

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    [Sep 18, 2014]
    Kinda verifies what I've been saying...
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  26. cuke2u
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    cuke2u Well-Known Member

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    [Sep 18, 2014]
    Give a gold star to that man ;) Again one of the points I was making is that, because not all cars can do this then in everyday motoring in every day cars, there is no advantage...
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  27. veeeight
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    veeeight I am a very pretty girl

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    [Sep 18, 2014]
    Hence why, only S3's recommend 98RON (or better) ;)

    AFAIK all the other A3's specify 95RON on the inside of the fuel flap (can anyone provide a photo if not the case?) - with no Performance advantage if they fill with 98RON.
    #26
  28. cuke2u
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    cuke2u Well-Known Member

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    [Sep 18, 2014]
    I don't seem to remember seeing anything about using higher octane fuel inside my fuel flap, however you will hard pushed to generate any increase in power into making your journey home any quicker. Strange how everyone goes on about increases in power when it is torque that really counts. I guess it's all just pub talk.
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  29. M1ke H
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    M1ke H Active Member

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    [Sep 19, 2014]
    All this talk of torque reminds me of Carroll Shelby, who once said "BHP is a measure of how hard you hit the tyre wall, torque is a measure of how far you push the tyre wall."

    The full quote was something like:

    "BHP sells cars, Torque wins races.

    or put it another way:

    Oversteer is when the rear of the car hits the tyre wall.

    Understeer is when the front of the car hits the tyre wall.

    BHP is a measure of how hard you hit the tyre wall.

    Torque is a measure of how far you push the tyre wall."

    :):):)
    #28
  30. Liquidfusion-S3
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    Liquidfusion-S3 I fall to peer pressure!

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    [Sep 19, 2014]
    A tractor has a load of torque, can't see it winning any races.... lol
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  31. cuke2u
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    cuke2u Well-Known Member

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    [Sep 20, 2014]
    Err, maybe because it was designed that way? If you look at modern direct injection turbo charged engines the torque has become quite diesel like thus top speed, acceleration and mpg have all improved over larger engines that don't have the same technology but similar bhp.
    #30
  32. Liquidfusion-S3
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    Liquidfusion-S3 I fall to peer pressure!

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    [Sep 20, 2014]
    Just responding to '"BHP sells cars, Torque wins races.'

    Torque doesn't always win races
    #31
  33. cuke2u
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    cuke2u Well-Known Member

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    [Sep 20, 2014]
    #32
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  34. cuke2u
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    cuke2u Well-Known Member

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    [Sep 20, 2014]
    That is correct as for their size of engine and power output the last f1 engines didn't proportionately have a great deal of torque, however the cars were very light and very powerful so bhp per ton was extremely high. But then you look at today's f1 engines, 1.6 turbo v6 with ers , similar weight, have far more torque and top speeds are far higher....
    #33

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