maxol e5 is what i use ,on stage three 380bhp no problem .it is the equivalent of tesco which is 99ron .i checked this out when i brought my cossie into ireland. a 500 cooler is a worthwhile mod to keep the temps down and the new specr one is very good at doing this .i run mine peak 32 psi and settles on 28psi.

my plan for ythe future is to get the car livemapped with the e5 for maximum safety

no need for octane booster .its too fookin dear.


is yours pinking under load mate ,have you checked your egts