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sorry if its been posted before but i couldnt see it....
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sorry if its been posted before but i couldnt see it....
Shell are also doing it
The word from the mighty mycroft aka V-Bird http://bbs.22b.com/ubb/Forum8/HTML/000527.htmlhttp://bbs.22b.com/ubb/Forum8/HTML/000527.html
Funny you should say that Rob as I was just pondering the same thing.
I have a friend who drives a TVR, Ibiza Cupra and an Impreza Turbo. All 3 of his cars are setup for normal 95ron, but he claims a noticable difference when using Optimax. Does this mean that a car such as the 172 which is already setup for 98ron is going to gain anything from running 100ron? Or is 100ron fuel only really of any use to Japanese Imports or cars where the ECU has been modified?
Of course Optimax also has the nice cleaning agents in it too, which Im not sure the BP stuff has?
BTW, Its suggested in the manual and inside the filler cap that 172s run on 98ron Rob, ron, rob, ron.....
I thought that Tom..as i never saw optimax on the continent
Lee, as far as i know if the ECU is set to take a particular RON, a higher one wont make any difference, but some ECUS can adapt to higher RON..
In optimaxs case it cleans out your engine, so the first couple of uses i would expect there to be a slight improvement (happened to me) otherwise your mates cars are maybe meant to take 98RON and he just doesnt know it
-Rob
I can explain this as i got told not so long ago..yay.. i can beat ben!
The octane rating of petrol tells you how much fuel can be compressed before it spontaneously ignites. And ecus have boundaries in where it can advance and r****d ignition to cope with various octane ratings..so the ecus are made to take a particualr ron ,but can cope with higher or lower to some degree..depending on the ECU of course.
The compression ratio determines the octane rating you neeed, so the high performance cars with a higher compression ration need the higher octane..which is why race cars run on 100ron +
So basically, its all determined by your ECU, or if your car has a highish compresion ratio, but then youll already know that as you would of been told you need a high RON. But ..unless you own a race car..or something very quick!! you dont need 100ron.
-Rob
The Jinx
Apparently the Italians get 100RON fuel as standard. So all Italian cars are setup with this in mind.
So Ive heard.
Either way its no use to me.
I think if you run a 172 on 95 ron it has a tendancy to pink more (detonate) in which case the knock sensor would detect this and r****d the ignition. By running on 98 ron or higher would cause less pinking. Correct me if Im wrong?
Chris.
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