Originally Posted by kam327
But why are you expecting a 3mpg gain from the shutters if the EPA rating is only 2 mpg higher, and that's with the use of lower rolling resistance tires and aero wheel covers? So if the combination of the shutters and wheels/tires gives you a 2mpg gain, I don't think you can expect more than 1mpg from the shutters alone.
I'm looking to add them, irrelevant of the outcome.
Let's keep this thread on topic of trying to figure out how to add the AGS.