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i use it all the time you can really notice the difference the car runs a lot smoother. Try a tank of the normal stuff then use a tank of optimax and see if you can notice the difference......... its not even that much more expensive.
i use it 99.9% of the time (unless i get caught out with no petrol miles away from a shell garage), and there is definately a difference, the car seems to accelerate and drive a lot smoother, and for the extra difference in price it is pointless settling for the normal unleaded.
Dunno if it is a coincidence but I tried a tank of Optimax a month back. Up until then I hadnt any problems starting but after filling with Optimax, the starting-up was very unreliable. I reverted back to 95RON and the starting up was ok again.
I dont know if its down to dodgy ignition timing, bad tank of fuel or just coincidence.
I intend to try another tank at some point, to see if the problem recurrs.
Comparing my latest MOT results to the ones I have before I bought the car seem to suggest that somthings changed. The bloke before me used to use normal unleaded, I use optimax. The emissions test figures from my last MOT were nigh on perfect. Only difference...fuel.
The MOT bloke commented on the car and its figs and he seem sceptical that optimax would have anything to do with it, but Im not so sure. I think it probably has, and I am very very sceptical about things like this. So IMO optimax is beneficial (christ did I just say that!)
Congrats on your new car, plus excellent choise of colours.
I, like you have to travel about 15 mins to local Shell garage that is owned by BMW in my case, so see lots of Cooper S Minis. I live 1 mile from the largest Tescos in Europe but I have always used Optimax as it gives me an excuse to go for a drive. As for extra performance, I dont know, probably not much, but if it does treat the engin better than regular petrol then I will continue to use it.
as far as the additives etc. in it i dont know. what i do know is that its almost pointless using a higher RON fuel if your timing isnt set to match. unless you can advance the ignition to make full use of it then all your doing is making it less likely to pink (which i doubt clios would do on 95RON anyway) i used to use optimax on my Escort, and with the timing set right it was definately more responsive and a LOT quicker. the main problem however was 1) the price 2) if your in the middle of nowhere without a BP or a Shell garage and NEED petrol... youre screwed, coz beleive me you WILL pink on 95RON
I only fill with 98+ octane as it says to do so on my filler cap door! "98 Recommendo" or something! It idles like a boat on 95 octane boat fuel but seemed to be better mpg on 95 octane? possibly because i didnt want to thrash it. Its magical stuff that optimax..... its like pouring liquid gold into the car when you fill up.