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Location:
Cabramatta, NSW
Registered:
May 2002
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Location:
Central Coast, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Tue, 01 February 2005 23:03
 
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The first site basically praises Shell Optimax as the best out there.... and then the 2nd site insinuates that its pot luck if you actually get anything better than standard "supermarket" fuel from an Optimax pump anyway?
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Tue, 01 February 2005 23:13
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Where's the praise? The guy actually got a lower MON rating from Optimax.
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Location:
Lost in the K hole
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Tue, 01 February 2005 23:27
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i dont have time to read the links right now... BUT:
i have always suspected that optimax has a shit MON rating compared to the other 98RON fuels. it explains a lot of the fuels behaviour in the engines ive driven with it.
a few years ago it was very easy to get a copy of the fuel reports from individual servos when they got their tanks filed and quality tested. since the introduction of the competitive 98RON market though, theyve all gotten very quite, and its exceedingly hard to get these reports
would be VERY interesting to read though
cheers
ed
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Location:
Central Coast, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Tue, 01 February 2005 23:28
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The first site states Optimax at 98RON, and Ultimate at 97RON (I don't actually know the difference between RON and MON... never heard of MON until today  )
And then this guy says "Ran mine on Optimax for almost a year with no problems (at 1.2bar for 3 months) or knock, had to use BP Ultimate once and was forced to turn the boost to 0.8 to avoid knock."
Kind of mixed results in there, but now that i've read both pages for a 2nd time, they both seem to point the thumbs down to Optimax.
Is Ultimate any better?? I never know what "performance" petrol to use
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Tue, 01 February 2005 23:30
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MON is the more important of the two under full load conditions.
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Location:
Central Coast, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Tue, 01 February 2005 23:35
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Ah!
so its like the RMS and PMPO (peak) of the stereo world?!
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Location:
Wollongong
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Wed, 02 February 2005 08:29
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PMPO is the most useless way I've ever seen of measuring speaker/amp power. Might as well just tell you how long until it catches on fire or melts
But yes, they are 2 different ways of measuring octane. It is for this reason that the USA always seem to run "shit" fuel compared to us (eg. 87 octane unleaded), but their measurements are in MON, not RON.
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Wed, 02 February 2005 09:50
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| Danners wrote on Wed, 02 February 2005 10:35 |
so its like the RMS and PMPO (peak) of the stereo world?!
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Kind of... Except that the RON figure is actually useful whereas PMPO is only useful if you've got a small penis.
RON describes fuel characteristics during low load, low speed driving. The stuff Mum & Dad are interested in.
MON describes fuel characteristics during high load, high temperature, high speed driving. The stuff that we are interested in.
| Soarer wrote on Wed, 02 February 2005 19:29 |
But yes, they are 2 different ways of measuring octane. It is for this reason that the USA always seem to run "shit" fuel compared to us (eg. 87 octane unleaded), but their measurements are in MON, not RON.
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The US figure is the AKI (Anti-Knock Index) isn't it? Average of RON and MON?
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Location:
Lost in the K hole
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Wed, 02 February 2005 10:07
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| Nark wrote on Wed, 02 February 2005 20:50 |
The US figure is the AKI (Anti-Knock Index) isn't it? Average of RON and MON?
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correct
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Location:
Brisbane
Registered:
October 2002
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Re: MON of the 98RON fuels?
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Thu, 10 February 2005 13:31
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Australian fuel regulations are trying to harmonise with the Euro fuel regs (usually lagging by a couple of years).
On the subject of MON ratings I believe the regs only specify that the maximum sensitivity (diff. between RON and MON) of any petrol must not be greater than 10 ie. minimum MON for a 98RON fuel is 88, for 95RON it's 85 etc. That means the anti-knock index for our 98RON fuel is at least 93.
I recall reading somewhere that it's not just as simple as refining a fuel with the highest possible MON because increasing MON points supposedly results in RON points being lost for each MON point gained.
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Registered:
November 2002
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Thu, 10 February 2005 23:32
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Good shit Mitch! I could almost kiss you.
Well, I did say almost... 
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Registered:
November 2002
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Re: MON of the 98RON fuels?
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Thu, 10 February 2005 23:47
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Do you have a sister ?
Only joking mate.
FWIW that makes our best pump grade fuel available here about equivalent to 93 octane rating stuff in the USA, and that is not available in all States over there, they tend to have 89 and 91 at their pumps.
Cheers,
Mitch.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Thu, 10 February 2005 23:57
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he doesn't have a sister I've met, but his fiancee is pretty cute 
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Fri, 11 February 2005 00:08
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Hey! Since when did you have eyes for anyone else when I was around, Draven?!
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Fri, 11 February 2005 00:16
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I'm a slut, plain and simpleof course you're the brightest star in my life max, but I can be distracted even from someone like you. Sorry baby.
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Fri, 11 February 2005 00:23
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*sniffle*
Lucky I've got Les to console me...
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: MON of the 98RON fuels?
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Fri, 11 February 2005 00:26
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| draven wrote on Fri, 11 February 2005 08:16 |
I'm a slut, plain and simpleof course you're the brightest star in my life max, but I can be distracted even from someone like you. Sorry baby.
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Yeah Nark, imagine whats going to happen when I slap my eyes on him, he'll be like, "Nark who?"
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