Octane Booster

Discussion in 'General Motoring' started by VTEC, Apr 16, 2005.

  1. VTEC

    VTEC Guest

    Hey all, i run my 4cyl honda vtec on premium fuel (as it should be).
    The premium here in australia is supposedly nothing compared to the
    overseas ones so i put some octane booster in my tank. It ran well the
    first tank yet i put a little bit more in the next time i filled up.
    After filling it the second time and adding the octane boost my car is
    running extremely rough. Conditions are

    - Idleing inconsistently and lots of engine movement - can feel it in
    the wheel!
    - Changed engine tempo, much deeper growl, sorta like a WRX with a 4
    inch exhaust (and my car isnt a WRX)
    - Extremely slow in low revs and struggling to pull hard, same in
    higher revs
    - When the VTEC kicks in it sometimes clears up but other times its
    extremely laggy.
    - Sounds like the cars going to backfire...... well not really but it
    has that excess fuel build up sound in the exhaust like theres unburnt

    Any ideas guys? i thought maybe the octane boost has clogged up my
    injectors yet im not too sure.

    VTEC, Apr 16, 2005
  2. Nope.

    It's designed to run on regular.

    If you doubt me, check your owner's manual.

    Gas with higher octane rating actually creates *less* power in an engine
    that's designed for the lower octane.
    Elmo P. Shagnasty, Apr 16, 2005
  3. Adding fuel injector cleaner is a cheap and easy step to take. If it clears
    up in the next couple hundred km you know that's what it was, and that
    additive isn't for you.

    Michael Pardee, Apr 16, 2005
  4. VTEC

    Jason Guest

    Hey Mate,
    What's is it like to live down under? I believe that you should start
    making use of regular gasoline and stop adding octane booster to the
    gasoline. I hope that you did not "burn" or damage the valves. I suggest
    that you or your favorite mechanic take a close look at the valves to make
    sure they are still working the way they are suppose to work. Also--adjust
    the valves if the valves are working normally. I don't know about the
    gasoline in your country--if it's dirty--you should install a new gasoline
    filter to see if that helps. If you have dirty gasoline in your town--you
    may have to replace the fuel filter everytime your engines starts to run
    Jason, Apr 16, 2005
  5. VTEC

    Eric Guest

    How much gas is still in the tank? It might be easiest to drain and refill
    it with regular gas. Disposing of the old gas might be a hassle, so it
    might be best to have your mechanic take care of it.

    Eric, Apr 16, 2005
  6. VTEC

    acctforjunk Guest

    acctforjunk, Apr 16, 2005
  7. VTEC

    uriah Guest

    First thing I would do is siphon all the contaminated gas out of tank
    and fill with the octaine suggested by owners manual. You may be
    lucky and as soon as old gas clears line car will go back to normal.
    uriah, Apr 17, 2005
  8. VTEC

    VTEC Guest

    hey again guys, thanks for all your responses!! Turns out my head
    gasket was leaking co-incidently at the same time id put the injector
    cleaner in! Found water in where the sparkplugs were so only 3
    cylinders were firing!

    Its not bad downunder thanks jason! Pretty kewl place to live.

    The reason i said the fuel was not all that great as ive been told the
    octane content in the fuels here both premium and unleaded were lower
    than places like japan. Seeing as i have an imported car i thought id
    run it with a higher shot of octane, it did make a difference though!
    Oh well, time for a new head gasket haha, thanks guys!
    VTEC, Apr 19, 2005
  9. VTEC

    Randolph Guest

    Happy to hear you found the problem.

    That might be a misunderstanding. There are different ways of measuring
    the octane rating of gas, there is the Motor Octane Number and the
    Research Octane Number, the difference being how the measurements are
    done. In the US the published number is called PON, or Pump Octane
    Number and this is the average of RON and MON. In Europe and many other
    regions the RON only numbers are published. For a given gas blend, the
    RON number is higher than the MON number, so a European gas sold as 92
    octane will be a lower octane gas than what is sold as 92 octane in the
    US. In the US, regular is 87 octane, intermediate is 89 octane and
    premium is 93 (sometimes 92) octane. You'll probably find that the
    octane rating for the different categories are higher in Australia
    (assuming they use RON like in Europe). Thus a US Premium is probably
    equivalent to an Australian Premium even though the posted numbers are
    Randolph, Apr 19, 2005
  10. Being able to laugh when facing a head gasket replacement makes you a
    stouter man than I am, VTEC! Sorry to hear about the tough break, glad it is
    on the mending path.

    Michael Pardee, Apr 20, 2005
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