Sounds like it could be the rod bearing, which causes the dreaded rod knock noise. If your dash shows the oil light, it's too late. Lack of oil is one of the things that could cause a spun bearing. Put oil in it, but I wouldn't drive it. You could end up causing more damage.
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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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