Car produces a deep rumple at 60 to 65 mph - approximately 2000 rpm. Cause?

This could be a vibration that is coming from the drive train or something causing a vibration in the engine. It would be best if you made a appointment to have this problem inspected and properly diagnosed.

dealer? Warranty?? TEST DRIVE WITH a technician and demonstrate the concern , to avoid them having your car all day and then telling you they heard nothing wrong!

New car with 1300 miles on it is under warranty - get it to your local dealer to have them diagnose and fix. unless of course you hit something to cause this issue, bring it to a competent shop. Unfortunately we cannot diagnose your car over the internet, phone or by having a conversation, a technician will have to experience this deep rumble to have any idea where to start the diagnosis.