They seem to have no problem with that
The higher octane gases make for a smoother drive and more power but regular is okay too.
Check the owner's manual, or online, but I recommend whatever the fuel cap or door says to use in order to make it run the best.
Yes
I would run it on whatever gas it recommends within the fuel door or on the gas cap since that would give it the compression rate the engine and turbos were designed for.
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