In this paper we present and analyze a Nash dynamic game model for invstigating public and private-sector oil inventory policies in unstable world oil markets. Conceptual results about the model include simple, verifiable conditions for uniqueness and stability of solutions, along with characterizations of optimal policies. We also present results and discuss computational issues that arise in determining ''subgame perfect'' infinite-horizon equilibria, using a steady-state policy iteration approach. 15 refs., 2 figs.