LegacyDan Posted June 30, 2012 Share Posted June 30, 2012 So my car has been tuned with the assumption I use 99 octane fuel in evert fill up. Since we are expanding our premises in work I am working more than not away from any gas stations that stock 99. Last few top ups have been with 95 octane. I have not been driving too much last few weeks with vacation and hospitals visits so i haven't been able to open her up and see how it runs on 95 and if my knock detector is seeing any knock. Would it be OK to use 95 occasionally and drive it in normally or should I stay off boost when using 95? Link to comment Share on other sites More sharing options...
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