[awthorn]

Maybe it is all in my head, maybe I am just a bit nuts. But after doing my mini header I have noticed better mileage. I have oddly noticed even better mileage if my windows are up and the A/C on; yes I live in FL and we are still needing A/C this time of year.

Anyone else notice this, or is my truck some kind of Vudu Magic?

[satek]

Better with windows up than down?

This is because you have less air resistance or drag by having the windows up rather than down.

[muttbutt]

Originally Posted by awthorn

Maybe it is all in my head, maybe I am just a bit nuts. But after doing my mini header I have noticed better mileage. I have oddly noticed even better mileage if my windows are up and the A/C on; yes I live in FL and we are still needing A/C this time of year.

Anyone else notice this, or is my truck some kind of Vudu Magic?

your theory makes sense haha i get it.. but im betting the differences are only marginal and arent that significant

[drdolittlerwc]

Yeah, I think that whole theory has been 'BUSTED', besides, how much extra wind drag are you really going to have at 60-80mph? I mean it is an SUV, designed to CREATE wind drag! Now if you were doing say 200mph, yah...there might be an issue.....

[awthorn]

The reason I find this odd is because in every other car I have owned a/c running was worse mileage. With the 4runner I notice a large difference in power with the a/c on thus making the truck require more to get going. I have no clue. Maybe the difference is just marginal and I drive like a tool with those extra 10 HP when the a/c is off. Lol

[Nunyabiz]

I think the myth of windows down AC off equals better mpg has been pretty well busted.

Mythbusters - Save more gas with AC on or Windows down Ans with AC - YouTube