RepairPal Certified shops can diagnose and repair your 2014 Ford E-150. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
I am resaerching a similar issue with a 1998 e-150 v-6 engine. I am leaning toward an issue with a bad head gasket. You need to verify coolant in oil or vis-versa. Also, check the exhaust when you start it and look/smell for coolant! Not enough to hurt yourself!!