Active Grill Shutters - mpg?

[Sheen]

Hello,

 

I was wondering if anyone had any thoughts on how much fuel 'active grill shutters' would save you?  mpg with -vs- mpg without.

 

I've got a 2021 6.6 Duramax with snowpackage (so active grill shutters were deleted) and I'm just curious what I'm missing out on.

 

I found one bit of information from 2015 saying it was only about 0.5 % savings on fuel economy.  This seems barely worth it.  Is it really that low?

 

Thanks!

 

 

[MTU Alum]

You around two to three tenths mpg.

 

#iworkforGM 

[unit]

USA Today printed the following:

 

"On the Ram 1500 truck, active grille shutters improve fuel economy by an estimated 0.5 percent. For the average driver, that saves only 3.6 gallons of gas a year. But when it comes to CAFE standards, every bit helps — especially when improvements are relatively simple to implement".

 

Using that 0.5% number shutters would save 0.075 mpg if you average 15 mpg in normal driving.

[nards444]

Its all about CAFE and the aggregate and their fleet average.    Every half per cent over x models helps them get to where they want to be