Subaru say that any Subaru (except Diesels) can run on up to E10 blended fuel as long as the specified octane rating is maintained, (eg, 95RON for WRX, 98RON for STi). BUt the info in the bulletin only goes back to 08.
I found the 100RON E10 at my local United on Saturday, needless to say I put it straight in the Bug. Haven't really noticed a difference as yet. But I've only travelled 30 odd k's. LOng drive to work tomorrow, (moved from Wangara to Ossy Park Subaru) so we'll see how we go.

I want to retune and add a little bit of timing or boost, but then I'm thinking, what if I can't get 100RON cause I'm not near a United? Might just add a bit of timing and let the factory knock control deal with it.

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F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i