Ummmmm..... With that many miles...... Aint no way you had the cruise set a 60 MPH. You would have to go over 70 MPH (a bunch) to maintain an average speed of what you say. Your average speed is too close to "what you say" your top speed is (unless you were cheating and cutting the GPS off as you were approaching exits.).
Either way... Cool tow vehicle!! I like seeing a diesel towing a gasser.
BTW>> I drive for a living...