You can put some on the highway, but you want the majority of the miles to be city driving. To be safe, just go some extra mileage to make sure you get the proper break in. I'm sure you can go out for a weekend and drive around in town.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
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