A method for maximizing a fuel efficiency of an engine includes the steps of providing an engine including a plurality of cylinder bores formed therein, disposing at least one first permanent magnet on a piston and at least one second permanent magnet on the throw, disposing a plurality of electromagnets in the engine block, selectively attracting and repelling the at least one first and second permanent magnets with a magnetic field of the electromagnets to affect a motion of the piston in respect of the engine block and deactivating and reactivating the plurality of cylinder bores in a desired sequence by stopping a flow of fuel thereto and a flow of electrical energy to a spark plug for a deactivated cylinder bore without deactivating an intake valve or an exhaust valve for the deactivated cylinder bore.