Otane level for rx8???
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Otane level for rx8???
Here in australia the highest fuel octane level is 98 octane SHELL OPTIMAX. i am told that this is suitable for the rx8 but the rx8 mazdaspeed may not be coming to australia becouse it needs a higher octane level than currently in australia .What is the optimum octane level at which both the rx8 and the mazdaspeed rx8 operate to its upmost performance level??? What fuel is available in your part of the world , i know that we miss out on quite a few high production cars becouse of our low octane levels .
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tyranosaurus rex-8
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california octane ratings are pump octane numbers (PON) which is an average of motor (MON) and research octane numbers (RON). i suspect the 98 australian octane is research octane which is about the equivalent to our 89 or 91 octane here.
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That sounds about right. Thanks for the link lefuton.
If you believe what the website says then our fuel rating seems to indicate that we get the same general quality of fuel.
The lowest grade you can get here in the UK is 95RON, which is roughly equivalent to 91PON.
Now if only we can get the prices the same. :D
Shahpor
If you believe what the website says then our fuel rating seems to indicate that we get the same general quality of fuel.
The lowest grade you can get here in the UK is 95RON, which is roughly equivalent to 91PON.
Now if only we can get the prices the same. :D
Shahpor
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Originally posted by shahpor
website says then our fuel rating seems to indicate that we get the same general quality of fuel.
website says then our fuel rating seems to indicate that we get the same general quality of fuel.
![Wink](https://www.rx8club.com/images/smilies/wink.gif)
so, there is more to it than the octane rating...
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
![Wink](https://www.rx8club.com/images/smilies/wink.gif)
#10
Ricer is Nicer.....
![Cool](https://www.rx8club.com/images/icons/icon6.gif)
I agree with wakeech absolutely, and that chart is a GROSS oversimplification - some batches/formulations will be almost the same MON as RON, some WAY apart.
Chemicals can make a big difference, as can base stocks. (In winter 'they' can add lots of Butane, which has a lovely octane rating, up to 10% of a blend, but it is wee-wee for power!)
Once again let me hint about sulfur levels, the refinery you would be getting your gas from would be the 'low-sulfur-award-winning' Sarnia plant, if your brand rhymes with SMELL.
The U.K. has always measured RON+MON/2 as far as I know, and cannot by law state just the RON on the pump - and why would you care about JUST the RON anyway, it is meaningless without the MON?
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Doc
Chemicals can make a big difference, as can base stocks. (In winter 'they' can add lots of Butane, which has a lovely octane rating, up to 10% of a blend, but it is wee-wee for power!)
Once again let me hint about sulfur levels, the refinery you would be getting your gas from would be the 'low-sulfur-award-winning' Sarnia plant, if your brand rhymes with SMELL.
The U.K. has always measured RON+MON/2 as far as I know, and cannot by law state just the RON on the pump - and why would you care about JUST the RON anyway, it is meaningless without the MON?
.
.
.
Doc
#11
tyranosaurus rex-8
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i wouldn't say it's meaningless with only the RON but then you could still be left with an overly sensitive fuel and have a low MON
and yes i totally agree it's a gross simplification, but it atleast explains the disparity of the numbers in different nations. when i was in south america, all gas was listed as 94/98/104 octane.. i never really looked to see if it was RON but it would seem that that would be a reasonably safe assumption.
stuff like this makes me kinda glad i live in cali...even if our registration fees and emission laws are getting of hand.
and yes i totally agree it's a gross simplification, but it atleast explains the disparity of the numbers in different nations. when i was in south america, all gas was listed as 94/98/104 octane.. i never really looked to see if it was RON but it would seem that that would be a reasonably safe assumption.
stuff like this makes me kinda glad i live in cali...even if our registration fees and emission laws are getting of hand.
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Re: Octane shmoctane...
Originally posted by Doctorr
The U.K. has always measured RON+MON/2 as far as I know, and cannot by law state just the RON on the pump - and why would you care about JUST the RON anyway, it is meaningless without the MON?
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Doc
The U.K. has always measured RON+MON/2 as far as I know, and cannot by law state just the RON on the pump - and why would you care about JUST the RON anyway, it is meaningless without the MON?
.
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Doc
As far as I know, here in the UK it is measured in RON. On the pump it states, for example, 98RON.
Also, the website does state that it is a general measurement and that different batches of fuel have different properties.
I, for one, would never put supermarket fuel in my car as I have been told that it is of bad quality.
Shahpor
#13
Re: Re: Octane shmoctane...
Originally posted by shahpor
I, for one, would never put supermarket fuel in my car as I have been told that it is of bad quality.
I, for one, would never put supermarket fuel in my car as I have been told that it is of bad quality.
The fuel all comes from the same refinery, whats different is the additives each company (tesco, shell etc) add before it gets to the pump.
Half the cars on the roads dont have knock sensors and wont take advantage of higher octane fuel, if you use optimax (for example) in one of those ALL the benifit is comming from the detergents, might as well use some redx/injection cleaner every 5k.
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OK, maybe quality is a bad word to use. But the additives also contribute to how well the car will run and I have noticed that my car does run better when I put Optimax in it in relation to supermarket fuels.
Shahpor
Shahpor
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