Im a bit of Scooby Newbie, ive been running my 95WRX on SUL & Millers octane - about 1 bottle per tank - last week i filled up with Optimax - what are peoples views on wether to use octane with Optimax - as its already 99 octane, and if so - how much??

Cheers,
phil

 

I have started using Optimax with one bottle of Millers every fill up in my STi,These cars have original ecu settings on 102 RON!!!!!!!,same as you WRX

Darren