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Thread: 91 or 98 fuel?

  1. #61
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    Quote Originally Posted by SMOKEU View Post
    There's a first time for everything.
    "So if you meet me, have some sympathy, have some courtesy, have some taste ..."

  2. #62
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    Quote Originally Posted by Banditbandit View Post
    Are you alright there sir?

  3. #63
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    Quote Originally Posted by Corse1 View Post
    As long as the engine does not emit any "pinking" noise then from all the posts I have read on different forums the lower octane is better.
    You won't hear the most deadly (to engines) detonation noise... at higher rpm.
    If it wasn't for a concise set of rules, we might have to resort to common sense!

  4. #64
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    Quote Originally Posted by Juzz976 View Post
    So whats the RON rating of a fuel got to do with how fast it burns?
    Lower RON fuel burns faster. That is to say, the rate of propogation of the flame front is higher. The peak cylinder pressure is reached sooner.
    If it wasn't for a concise set of rules, we might have to resort to common sense!

  5. #65
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    Which is what I was saying in post 52
    Do you realise how many holes there could be if people would just take the time to take the dirt out of them?

  6. #66
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    Re: BMW R1150GS
    From the Wiki, speaking of upgrades from the previous 1100GS: An anti-knock sensor adjustment change allowed the adventure version to run on lower quality gasoline as well.

    From here: https://en.wikipedia.org/wiki/BMW_R1150GS

    So, sounds like the electronics can detect and adjust via the ignition/fuel injection.
    "May all your traffic lights be green and none of your curves have oncoming semis in them." Rocky, American Biker.
    "Those that give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin, 18th C.

  7. #67
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    Wow nice dredge.

    Anyway while I'm here, what's wrong with 95?
    Nunquam Non Paratus

  8. #68
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    23rd October 2017 - 16:14
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    Correct fuel to use?

    I Have a 1993 Kawasaki ZZR 400, what fuel should I be using? according to the specs it has a 12.8:1 compression ratio. and I'm using BP 98
    but not all BP stations have 98 at there pumps
    It's also in bad need of a tune but no bike shop around seems to be able to get it right and is running way to rich... I did a run up north to
    Whangarei from west Auckland, 182kms to my destination and at 171kms I had to switch over to reserve. I use to get 230kms!!
    So before I take it to someone else to try and tune, I want to put in the right fuel to start with.. Would 91 be sufficient? or 95?
    Cheers

  9. #69
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    Quote Originally Posted by TripleGee View Post
    I Have a 1993 Kawasaki ZZR 400, what fuel should I be using? according to the specs it has a 12.8:1 compression ratio. and I'm using BP 98
    but not all BP stations have 98 at there pumps
    It's also in bad need of a tune but no bike shop around seems to be able to get it right and is running way to rich... I did a run up north to
    Whangarei from west Auckland, 182kms to my destination and at 171kms I had to switch over to reserve. I use to get 230kms!!
    So before I take it to someone else to try and tune, I want to put in the right fuel to start with.. Would 91 be sufficient? or 95?
    Cheers
    I get 200km from a tank of gas with a rsv aprlia mille

  10. #70
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    With the compression I'm thinking 95. 98 is fine too if BP is local. Bet you don't notice any difference between the two.

    Mind you I bet the compression is south of the original figure by now.

  11. #71
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    Im a huge nerd when it comes to economy and fuel types. I have a huge spreadsheet for the car but Ive not got round to starting one for the bike.
    My manual says I can use 91 or above (honda spada), as well as ethano fuel up to 10%, but NOT methanol (because everyone with a 250 has an abundance of that).

    Anyway so far:

    Mobil 95: 8.63L, 211km.
    = 4.1L/100km
    = 24.45km/L

    Gull 91:
    207km, 9.69L.
    = 4.68L/100km
    = 21.36km/L

    Mobil 95: 199km, 8.71L
    = 4.38L/100km
    = 22.85km/L

    The result I have for 98 is no good cuz it pretty much spat the dummy so I wont post them.

  12. #72
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    fark the cbr is a boat compared to those, im getting ~ 11 KM/L ._. and trying to be sensible most of the time

  13. #73
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    Quote Originally Posted by Scubbo View Post
    fark the cbr is a boat compared to those, im getting ~ 11 KM/L ._. and trying to be sensible most of the time
    My FJ averages 14 km/L on most trips.
    Sweat wipes off. Road-rash doesn't.

  14. #74
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    23rd October 2017 - 16:14
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    AllenB. No I don't notice any difference at all between 95 and 98 so I am thinking of going back to 95. But if I can, I wouldn't mind using 91 if my bike could handle it ok...

  15. #75
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    23rd October 2017 - 16:14
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    Yokohama.... These are the figures i use to get...

    Gull 98 Bio Fuel :- 230km to 16 litres

    BP 98 :- was similar at 229km to 16 litres

    Caltex 95, Z 95 were the same at 220km to 16 litres

    G.A.S. 95 :- 180km to 16 Litres and bike ran like a piece of S###

    Discovered that I shouldn't have been using Gull Bio 98 due to the ethanol. And have been told this may have screwed up the jets in the carbs..
    So I may have to get new kits for all four Carbs..

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