My Jeep wrangler 3.8L V6 has a ticking noise while idling and it gets faster as the rpms go up. It started happening and I checked the engine oil and it was empty I filled it right up after.
Ok, if you ran it without oil you can destroy your engine. From rod knock, to a seized up engine. Or if it was really low. You could have just had a lifter noise(tap noise). You either loss your oil by a leak or burning the oil internally or just plan lack of maintenance.