[gasss]

Quote: Originally Posted by msh441 (original)

92-94 octane is considered "premium grade" .

92octanes, ¿is a joke? , i never think at 2008 year this class of octane fuel would be avaliable for our moderns engines with turbocharger, direct injection, admision variable distribution, electronic sensor temperature.....

Personally and sincerally, i think this could be one of the principal reason for different performance between us and european mcs power engine.

In spain, just avaliable 98octane and 95octane, in last years 98octane is the most used and appreciated for the drivers, even customers prefer 98octane plus like Shel V-Power98 or 98octaneSuperPlus (both almost 99 real octane), and i know at countries like german, austrian, switzerland etc have avaliable 100octane fuel in most of the gas station.

regards from Madrid

[msh441]

Quote: Originally Posted by gasss (original)

Personally and sincerally, i think this could be one of the principal reason for different performance between us and european mcs power engine.

Crunching the numbers to get everything to wheel horsepower puts all the cars in the general area of where you would expect them to be. At the wheels, the JCW adds what the factory advertises and then some (20-30 whp depending on which of the two Euro cars you go by). I'm sure that your right and that the higher octane fuel adds some power... but again I would guess that it's 5hp or less. Also, for every hp gain by the use of higher octane fuel in the S cars... thats another hp difference between the R56S and R56JCW kitted car (assuming I would experience the same gains going to 98 octane, right?).

Another thought, though... I wonder if the higer octane fuel is allowing the fuel/air mix burn more effectivly as the ECU leans out the engine around that 3000rpm zone? Basiclly allowing it to burn and continue to make power, where a lower octane fuel wouln't. Instead of loosing steam and showing a power dip like the US, Pre-ECU tuned cars, the higher octane gas fills that hole. Hmmmmm...

[Japper]

Quote: Originally Posted by gasss (original)

92octanes, ¿is a joke? , i never think at 2008 year this class of octane fuel would be avaliable for our moderns engines with turbocharger, direct injection, admision variable distribution, electronic sensor temperature.....

Personally and sincerally, i think this could be one of the principal reason for different performance between us and european mcs power engine.

In spain, just avaliable 98octane and 95octane, in last years 98octane is the most used and appreciated for the drivers, even customers prefer 98octane plus like Shel V-Power98 or 98octaneSuperPlus (both almost 99 real octane), and i know at countries like german, austrian, switzerland etc have avaliable 100octane fuel in most of the gas station.

regards from Madrid

Gasss, 92-94 octane in the states is equivalent to our 95-99 octane fuel IIRC.

[gasss]

I´ve seen with my own eyes, how the same car, a Golf GTI V 2.0T, run just 208cv with 95octane fuel, and only 5days after, at same dyno, with more or less the same conditions (temperature, pressure....) but using 98octane, run 224cv, surprising?, and the most important is that the car on the road, driving it, feels certainly better.

Golf GTI V´s engine, is very similar to our MCS R56, turbocharger, direct injection, more than 10:1 compression cilynder relation, etc

In my MCS R56, i feel the same, car with 98octane is just better in all the ways than 95octane, really much better.

sorry all of you for my poor english, i would like to be able to keep a speech more fluid about mechanic stuff and all this themes, but its a bit hard try to discuss in your language.

Al last, i´ve already my JCW instaled, i just have driven a few kilometers, but at the moment, really happy, not big or huge differences, but engines feel more cool

regards from Spain

[mason storm]

From what I have read and been told the Mini Cooper S is deisigned to use 95 octane fuel while I think the Golf is designed to use super unleaded so I'm not sure you are meant to get any more power with super unleaded ina MCS?

[gasss]

Quote: Originally Posted by mason storm (original)

From what I have read and been told the Mini Cooper S is deisigned to use 95 octane fuel while I think the Golf is designed to use super unleaded so I'm not sure you are meant to get any more power with super unleaded ina MCS?

Owners manual R56 tell clearly that the car can use 95octane but "WITH A LITTLE LOST OF POWER" respect 98octane use, at least the european owners manual advise about it, i can scan the manual if you want (so it´s in spanish), how much hp is this "little lost of power"?, i´dont know, it doesnt show this data, just advice about differents power engine between using 95 or 98octane.

regards from Madrid

[minichara]

In Greece, three types of gasoline are available.
95 oct, 95 oct and 100 oct.
I use 95 oct but the last three refills are with 100 oct were I noticed a significant change in performance.