 His innovations in the use of [[Lockheed P-38 Lightning]] fighters impressed a supportive Gen. [[Douglas MacArthur]].Lindbergh introduced [[Air–fuel ratio|engine-leaning techniques]] to P-38 pilots, greatly improving fuel consumption at cruise speeds, enabling the long-range fighter aircraft to fly longer range missions.P-38 pilot Warren Lewis quoted Lindbergh's fuel saving settings, "He said, '...we can cut the RPM down to 1400RPMs and use 30 inches of mercury (manifold pressure), and save 50 - 100 gallons of fuel on a mission.'"