My local Shell garage has started selling Optimimax.

Is anyone using this in their STI Type UK and noticed any improvements?

 

I would run any scoob on optimax as its a much more refined fuel for our cars, it doesnt matter if its a UK STi or an MY00, it just makes your car run smoother and adds better fuel consumption to boot

Tony
PS you will find better fuel consumption but cos it feels smoother your going to want to put your foot down more often

 

If the ECU can detect knock as well as the previous ECU then it should run better due to a more advance ignition.