On the radiator, you don't need to squeeze the hoses. The GSR has a coolant bleed bolt on the water neck passage going to the head.
As for burning oil, VTEC burns oil. So if you are in VTEC constantly, it could happen. Get a compression test done and come back to us with the results so we can help diagnose if there is a problem.
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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
Team B.O.B.® - Ballaz on a Budget