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19-01-2015
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Established Member
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Join Date: Jan 2014
Location: Sydney, Australia
Posts: 196 What Jeep do I drive?: JK
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Quick Conversions based on http://en.wikipedia.org/wiki/Octane_rating and http://www.pencilgeek.org/2009/05/oc...nversions.html
US 87, 91, 94
AU 91.1, 95.3, 98.5
but as there is no exact formula due to the different styles of measurement they are to be taken with a grain of salt.
Last edited by BLUE09; 19-01-2015 at 08:36 PM.
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19-01-2015
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No Winching
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Join Date: Jun 2010
Posts: 3,145 What Jeep do I drive?: WJ
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Quote:
Originally Posted by JGW
I was told by a reliable source that American rating is different to ours and that their fuel is better. Their 87 is almost equivalent to our 98. Bloke that told me and his dad has been doing engines for a long time, over 60 years combined experience and is involved in all sorts of racing at Eastern Creek. Me? No clue..  |
I'm not sure their fuel is technically better but their rating system is different, they use MON we use RON. Don't ask me what the actual differences are.
You are right the numbers are different but I think you will find it's more like their 87 MON is similar to our 91 and their 91 our 95.
What's in the owners manual for the V8. I believe it is a fairly low compression (9.0:1) engine so there should be no need for high octane, nor any real performance benefit. Any name brand 91 should be fine.
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19-01-2015
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Jedi Master
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Join Date: Jan 2011
Location: WJ JK Jeep Trailer Jeep R/C Sydney
Age: 79
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Yeah, I'm not so sure neither. That's what I was told. Probably a bit of an exageration but there's some truth to it.
Anyway, OP has his answer, they're all OK. I go midway 95
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20-01-2015
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I just registered
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Join Date: Jan 2015
Posts: 4 What Jeep do I drive?: WJ
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Thanks everyone for the info and the links, that helped.
I'll stick with 95 but good to know that 91 is good as well, and that 98 only makes sense on the HO version.
Cheers
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