2011 Dodge Durango 5.7l Hemi. 114k miles. We drove from Nebraska to Pennsylvania and in Ohio oil started coming up through the oil filler cap. I took the dipstick out and it doesn't come up through the dipstick tube after 2 miles. Causes or solutions? I recently replaced the PVC Valve, no oil leaking from drain plug or oil filter. Would a new filler cap be a good place to start or a waste of time to replace?