Real world MPG difference from removing your air dam?

[CMill4Runner]

Wanted to ask if any of you guys have seen a difference in MPG's removing the air dam. Just watched a TFL video and they got .8 MPG more with it on and they tested in Denver area where I live. So I will leave mine on and remove if wheeling or deep snow is coming, is it pretty easy to take on/off? I don't have mine yet is why I'm asking.

TFL test video:

 

[timelapse]

Wanted to ask if any of you guys have seen a difference in MPG's removing the air dam. Just watched a TFL video and they got .8 MPG more with it on and they tested in Denver area where I live. So I will leave mine on and remove if wheeling or deep snow is coming, is it pretty easy to take on/off? I don't have mine yet is why I'm asking.

Less than 1mpg loss based on testing by others. With it on, you don't have much clearance to park close to a curb, so it'll probably get ripped off at the mall or on a rock...

 

[CMill4Runner]

Ahhh must be really low then, this is my wives so it will get ripped off in a week! Guess I'll go the other way and add only for road trips.

 

[Hacksaw]

TFL did a pretty well controlled test and route on the same day so I'd tend to count their numbers more than random driving routes across full tanks where there are a lot more variables in the result.

 

[nubbins_]

Less than 1mpg loss based on testing by others. With it on, you don't have much clearance to park close to a curb, so it'll probably get ripped off at the mall or on a rock...

I wish the Taco and 4R new air dam didn't look so god awful and didn't have such gaping holes for the tow hooks. Then it would be easier to trim the air dam down in size but keep it on, like can be done for some other trucks. Doing that here just splits the air dam into 3 useless pieces with 2 giant holes in the middle

 

[Hobb3s]

city 19 in my limited, highway im at 22.5/23. sitting at around 1mpg less than advertised with the air damn off