Unleaded (95) V SuperUnleaded (99)
#1
01-11-2007 | 05:06 PM
Unleaded (95) V SuperUnleaded (99)
I know this has probably been posted before but, I have only just checked it out.
I've been running the X on the usual unleaded (95 ron) and it seems ok re peroformance and economy. I was out last night and she needed filled up as she was nearly empty. I thought this was as good a chance as any to check it out and see what the fuss was about, so I filled her right up with Superunleaded (99 ron) at 4p a litre more to see if there was any difference.
I gotta say I was really sceptical, but -
I just did a 6 mile run and decided to give her some and WOW. It was like night n day. She pulled better in every gear, seemed so much more responsive and willing whenever you asked for more. I couldn't believe the extra pulling power even in 4th gear!
I haven't had the chance to check economy to see if there is any difference, however, as it stands at around an extra £2 - £2.50 per tank I think I for one will be using Superunleaded to get the absolute best outta my X.
If you haven't already, check it out
Jim C
#4
01-12-2007 | 11:52 AM
RE: Unleaded (95) V SuperUnleaded (99)
ORIGINAL: andersen06
Yeah we had this discussion before. Most people use super(america only goes to 93 octane). Thats the best we got. I think the X runs much better with super...
Yeah we had this discussion before. Most people use super(america only goes to 93 octane). Thats the best we got. I think the X runs much better with super...
then I guess wer'e really lucky then, cos I swear that the 99ron Superunleaded is like rocket fuel........major difference!
Jim C
#5
01-12-2007 | 12:09 PM
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Posts: n/a
RE: Unleaded (95) V SuperUnleaded (99)
I guess i need to repeat my other post..
from wikipedia:
"Measurement methods
The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel through a specific test engine with a variable compression ratio under controlled conditions, and comparing these results with those for mixtures of isooctane and n-heptane.
There is another type of octane rating, called Motor Octane Number (MON) or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON.
In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, would be 91-95 (regular) in Europe."
this means that US premium is the same as Europe/UK premium. the difference in number is due to a different measurement method.
What Jim is referring to is something like Sunoco ULTRA 94... that would be 99 in UK. they dont have a low grade "regular unleaded" over there...
from wikipedia:
"Measurement methods
The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel through a specific test engine with a variable compression ratio under controlled conditions, and comparing these results with those for mixtures of isooctane and n-heptane.
There is another type of octane rating, called Motor Octane Number (MON) or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON.
In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, would be 91-95 (regular) in Europe."
this means that US premium is the same as Europe/UK premium. the difference in number is due to a different measurement method.
What Jim is referring to is something like Sunoco ULTRA 94... that would be 99 in UK. they dont have a low grade "regular unleaded" over there...
#6
01-12-2007 | 03:14 PM
RE: Unleaded (95) V SuperUnleaded (99)
ORIGINAL: bojangles
What Jim is referring to is something like Sunoco ULTRA 94... that would be 99 in UK. they dont have a low grade "regular unleaded" over there...
What Jim is referring to is something like Sunoco ULTRA 94... that would be 99 in UK. they dont have a low grade "regular unleaded" over there...
we do have regular unleaded over here, but ours is 95 ron.
Cheers
mate
Jim C
#7
01-12-2007 | 06:17 PM
Guest
Posts: n/a
RE: Unleaded (95) V SuperUnleaded (99)
LOL but that is the premium here..
why is this point hard to make.. just subtract 5 from the EUROPE number to get the American number...
we have as low as 85 octane here that is 90 there you dont have that... your 95 is our 91... that is premium here - regular there..
why is this point hard to make.. just subtract 5 from the EUROPE number to get the American number...
we have as low as 85 octane here that is 90 there you dont have that... your 95 is our 91... that is premium here - regular there..
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#8
01-15-2007 | 04:53 PM
Veteran Member
Joined: Sep 2006
Posts: 5,671
Likes: 4
RE: Unleaded (95) V SuperUnleaded (99)
So all you guys in Europe do you have TurboBlue fuel? Over here its 110 racing octane which is to only be used in off-road vehicles. Man was it awesome in my crotch rocket!!! Plus the little bit of a high you got out of intentionally smelling the exhaust....brings back good memories!
#10
01-29-2007 | 01:24 PM
RE: Unleaded (95) V SuperUnleaded (99)
Re feul figures of unleaded (95) againts Superunleaded (99)
I've just run through another tankfull, with a few boot sessions, just a couple ( love to hear that growl)
Anyways - trip showing 261 miles and light just on, I guessing around 30 miles left in it!
That gives us around the 24mpg mark I reckon, and thats not too bad for the extra oomph thats there when you need it.
Just brimmed the tank again, and intend to run it through once more and see how the figures come out this time!
JimC
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