You lower the nose and increase the speed to 100 KIAS (knots indicated airspeed). The aircraft is only climbing at 200 fpm, but the oil temperature has stabilized just inside the yellow arc. You look at the other gauges and it seems like the oil pressure is a little lower than normal, but still within the green arc. It might just be your imagination, but the sound of the engine seems to have changed just a little bit. You look at your passengers, but they seem quite content to gaze out the window at the terrain below. What do you do?

You give your head a shake and tell yourself to quit imaging things. You carry on, remaining alert for any other signs of a problem.

You decide to change your mind and return to the airport.

You decide to change your mind and level off right now.