How does using your AC effect your gas milage

[Calclips]

How much more gas does your truck suck when your running the AC? Is it a noticable impact, or is that just an old farce?

 

[Skigirl]

Dunno, but if I get less mileage than I do now, I'll be getting gallons per mile (GPM) /forums/images/icons/tongue.gif

 

[69K5]

you mean you can measure how fast the gas gets sucked through. my eyes arent that fast.

 

[Blazer_Boy]

I've heard that at cruise on the highway you burn less because you have the windows rolled up and less drag.

 

[Bubba Ray Boudreaux]

The A/C compressor, when engaged takes up some power, so the engine has to run a little higher rpm for the same speed. Now with the windows down, all the air is going somewhere, right inside so there's drag, but I haven't seen a real big difference in mileage between A/C down the highway, compared to no A/C with the window up.

 

[loudnowlouder]

yeah you're right
after about 35 mph the drag with the windows down will suck more gas than the a/c running...probably wont feel much power difference, but if you're on a long trip you might notice it...

 

[Scorpion]

I'm sure the biggest difference in gas milage is when you are stop and go. I can't remember the exact figure but the A/C compressor costs about 10 or so ponies when it's off and much more when it's engaged. I would imagine that a motor that doesn't even have a compressor would get much better milage than one that has one and is on no matter what the driving conditions.

 

[jekbrown]

drag from the windows being down prolly wouldnt be too fierce if the hard top and tailgate were off... and there was no rear seat. /forums/images/icons/tongue.gif

J

 

[chulisohombre]

i dont have ac onmy 5k,but the wife has it on her car.you get about a 10 to 15 percent drop in gas milage using ac as if you dont use it.we get about 20 mpg without 15 with it.i cant stand being too hot so if i can use it i do.i say,"**** gas milage if you can be comfortable" at least if it is a long trip.but for a trail rig i wouldnt have it.just sucks more power that can gop to the wheels /forums/images/icons/laugh.gif