Optimax works!

[sKrEwBaLL]

Looks like the supermarkets may also be jumping on the high-octane petrol bandwagon.  I work in IT for one of them and I heard someone asking if there would be much IT work involved integrating "a new grade of petrol"

[AndyY]

Optimax isn't as good as everybody thinks, before you fillup ask at the main till how long it was since they last filled up the tank, optimax has a 'tank life' and is actually stated as Enhanced 95 Ron.

A better octaine booster is toulene, unfortunately it's also illegal for use as a fuel within the UK.

IF you have some time to spend then you could always read this as it pretty well sums up everything about octaine boosters and fuel

http://www.gtr.co.uk/forum/upload/showthread.php?s=5c443473c0f39e67724534d785c3fd45&threadid=2480&highlight=toluene

[AdamB]

I see this topic could get hot again. But here is my experience. Since using solely optimax for the past 3 months, I average 3-4 mpg more than before. There, was a noticable difference in performane within the first tank, and improved more after several more tank fulls went through the engine. Torque and responsiveness, have noticably improved too.
This is certainly no placebo, as regular just seems to sap its will to drive compared to the good stuff.
Maybe my car is more atuned to this type of fuel than others. But if you are in any doubt - try it for yourself. If you dont like it then just go back to your old fuel. I know I'm going to stick with it.

[sKrEwBaLL]

I have noticed improvements too