Took the words out of my moyth
Used to run a Mk1 Mondeo V6 with tunned up engine and ran Optimax nearly all the time. However, I found that sometimes I just wasnt able to get any higher octane fuel so I would add Octane booster to regular fuel to help me out
Another alternative is to keep a large fuel can at home with higher octane in so you can top up now and again.
BTW Optimax and Octane booster is good aswell
