Our recently acquired 1972 Jeep Wagoneer 4x4 258ci L6 3 speed has serious mud tires on it which would be expensive to replace. They have plenty of tread left on them but they have some significant dry rot.
This video shows quickly how easy it is to reverse dry rot simply by using burnt (used) motor oil to return moisture to the tires that have dried out.
A very handy trick that can save you hundreds of dollars by getting more mileage out of older tires.
While used here on our old Jeep this process can be used on any dry rot tires.