Apparently FUSO in 2017 started using an electrically operated engine fan in place of a viscous fan. My dealer said it was to reduce engine load and increase milage. This may be a good idea except my fan engages much to much. On a recent trip it would engage for 20 to 40 sec. every 1 1/2 to 2 minutes while traveling on a level road with an outside temperature of 76 deg. F and an engine temperature that was normal. Is anyone else having this problem or does my FG have a temperature sensing or ECU problem?