No more Optimax :(
 

No more Optimax well not where i live anyway.... :(

Can anyone recommend another fuel or an octane booster to up the RON on normal unleaded?

Best to get it remapped to uk fuel.
In the mean time get OB from TSL (in scoobyshop) use with Esso super (if available)

Should have put in the first post ,iv got a UK car 03MY WRX PPP.

theres a couple of Esso garages near me not sure if they sell Esso super...

dij can you recomend any octane boosters?

Millers or NF are usually reccomended on here.
If you can get esso super though, that should be fine on a uk car.

thanks greg.g