The Oil Jet for Increased Efficiency system makes use of internally developed, and stored, oil pressure to direct additional force to assist moving parts in an internal combustion engine, rotating device of any nature, and/or any power producing mechanism, to assist in overcoming frictional, compression, drag, and other resistive forces within said mechanism in order to increase efficiency.Applications include, but are not limited to, timed application of said oil jet to assist in compression and exhaust strokes. Stead-state and/or timed application to rotating parts, including flywheel, alternator, transmission parts and other rotating parts to provide continuous additional force to assist in overcoming mechanical, frictional and other losses within the system.