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What fuel?

2140 Views 10 Replies 6 Participants Last post by  BuckMR2
Hi Guys.
Just a quicky. My XKR has arrived from the UK. Should be released today..yeh.
Our fuel here, NZ, is 91 and 95 RON. I think Mobile here also do 98 RON.
What does the XKR use? I'm guessing 95 RON........Cheers.
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95 should be fine, there will be little if any benefit running on 98.
Ye 95 ron will be fine by the way how much do you pay down there ?
Thanks guys 95 it is then.

Cost of fuel here is. 91 RON...$2.18 and 95 RON....$2.26 Not sure on diesel.

The RON units in NZ may be different to UK
In USA they are lower than UK for the same fuel as they are measured differently so a 95 RON (UK) fuel may be exactly the same as a 91 RON fuel in NZ???
Not saying they are in Nz as I dont know for sure but usually google brings up informative information
Muncher, congrats on the 'R'. Your fuel is cheaper than UK, but I concur with the others 95 RON (Random Octane Number) should be fine. I have found using barnded fuels such as Total or Shell give marginally more mpg than Supermarket fuel but it may be different in NZ. Enjot the car.
Thanks guys. I have been told that our (NZ) fuel has a slightly lower rating to the UK. Our 95 is slightly different to yours. Not sure how accurate that is though. I drive a couple of big V8's and use 95, seems fine.
Over here i like to use Caltex. Always appears to give crisper performance than my other choice, Shell, or Z as it is now called. Mobile is the only station i now of near me that stocks 98.
I asked my local Jaguar dealer what fuel they recommend i use. He said 91 would be fine????? Not confident in his reply i asked another out of town dealer he said 95 would be fine???????? Dealers!!!!!
My XKR has arrived and been cleared by customs and MAF. I take delivery tomorrow am. Just intime for a weekend of detailing :)
What I was trying to say in my previous post was that your 91 for example might be the same as our 95 if its like US Ron values where their 91Ron is the same as our 95RON.
Research Octane Number (RON)

The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.

RON is a defined standard it will not differ by country. Other systems like MON exist but why would you have a measurement unit that differs ?
Awaits people responding with gallons UK vs US others ??
Just been reading up on this and in USA figures arent RON they are AKI:-
United States: in the US octane rating is displayed in AKI. In the Rocky Mountain (high elevation) states, 85 AKI (90 RON) is the minimum octane, and 91 AKI (95 RON) is the maximum octane available in fuel.The reason for this is that in higher-elevation areas, a typical naturally aspirated engine draws in less air mass per cycle because of the reduced density of the atmosphere. This directly translates to less fuel and reduced absolute compression in the cylinder, therefore deterring knock. It is safe to fill a carbureted car that normally takes 87 AKI fuel at sea level with 85 AKI fuel in the mountains, but at sea level the fuel may cause damage to the engine. A disadvantage to this strategy is that most turbocharged vehicles are unable to produce full power, even when using the "premium" 91 AKI fuel. In some east coast states, up to 94 AKI (98 RON) is available.As of January, 2011, over 40 states and a total of over 2500 stations offer ethanol-based E-85 fuel with 105 AKI.Often, filling stations near US racing tracks will offer higher octane levels such as 100 AKI
Australia is RON same as here
Australia: "regular" unleaded fuel is 91 RON, "premium" unleaded with 95 RON is widely available, and 98 RON fuel is also reasonably common. Shell used to sell 100 RON petrol (5% ethanol content) from a small number of service stations, most of which are located in major cities (stopped in August 200. United Petroleum sells 100 RON unleaded fuel (10% ethanol content) at a small number of its service stations (originally only two, but it has now expanded to 67 outlets nationwide).
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