Automotive steam propulsion systems would have modest fuel quality requirements, but they would probably consume 50% more fuel than conventional gasoline engines giving the same vehicle performance. Lubricant needs of steam systems are still poorly defined, but they would include good rust protection, demulsibility and stability. The petroleum industry could meet these fuel requirements with little new technology, but substantial increase in capital would be needed for expanded refining, exploration, production and transportation facilities. Meeting lubricant needs would require a technical development program. Nevertheless, if steam-powered vehicles appear in significant numbers, commercial fuels and lubricants will be available for them.