What fuel do you use / recommend for a 2001 Jap import STI ?....
Do you use any Octane booster...? I dont..should I be...?
Do you use a Knock link.. ? where can I get one and which one do I buy...?

I keep reading and hearing lots of stuff on this subject, but the garage I bought my car from still says Optimax with NO Octane booster will be absolutely fine, he has been trading in Scoobys for about 15 years and has a good rep..

So what's the Hampden roar in your opinion....????

Cheers..