This is an old Humble Oil (who later merged with Standard to become Exxon) advertisement from a 1962 edition of Life Magazine.
Probably not the kind of thing they’d want to advertise now eh?
They proudly purport, and I quote, “This giant glacier has remained unmelted for centuries. Yet, the petroleum energy Humble supplies–is converted into heat–could melt it at the rate of 80 tons each second!”
