For the ecoboost engine in particular 190 200 seems to be the best temperature.
Active grille shutters ford.
Enter active grille shutters.
Essentially a way to boost fuel economy at higher speeds active grill.
But just like george foreman the engineers at ford are always looking for ways to make things better even the lowly grille.
Ford active grille shutters are special shutters in the grill that are opened and closed automatically to reduce aerodynamic drag while still allowing for proper cooling.
Active grille shutters are a system that optimize aerodynamics by using vents within the grille to adjust airflow to the engine department.
These are great for cold weather climates like canada but horrible if its not cold outside.
Over the past few years more automakers than ever have started to promote something called active shutter grille vents.
However the 2nd generation ecoboost in particular comes with these active grill shutters designed to keep the engine hot.