How much does your mpg drop running the a/c?

bmpxj · Jun 27, 2009

Just curious how much drop in mpg others see when running the a/c.

My set-up:
2000/4.0/D30/AW4/231/C8.25/3.55/3.5" RE SF/31" PC XMT's/both axles open/174,000 miles.

I usually get 17 or 18 mpg, but with running the a/c recently I have droppped down into the 15's. I don't recall dropping off that much last year and was wondering what others with a similar set-up are getting for mileage.

joe_peters · Jun 27, 2009

Sounds about right.

If you were loosing 20% or more I think there would be a concern.

Personally, I use my 2/65 a/c system.

93gc40 · Jun 27, 2009

The same. I run my AC anytime the sun is out. So I can't separate With AC/Withou AC fuel runs.

bmpxj · Jun 27, 2009

joe_peters said:
Sounds about right.

If you were loosing 20% or more I think there would be a concern.

Personally, I use my 2/65 a/c system.

I usually try to do that, too (4-dr), but drivers window regulator is broken and it is hard to get a good cross-draft going!

Filled up today and got 14.5 mpg...maybe time to look at the plugs. Anybody else having trouble finding the Champion Truck Plugs?

paroxysym · Jun 27, 2009

I usually get 15-17 with the ac on... That's highway though, stop and go I couldn't tell you.

tbburg · Jun 27, 2009

I get about 18-19 highway, AC use doesn't seem to make a big difference. Here's something you might want to look at though:
JP magazine

Ecomike · Jun 27, 2009

Mine is a Renix, 87, I have not noticed much of a drop in mpgs from my AC use, but as hot as it is this week, that might change as the AC load is way up there now.

I notice the biggest MPG difference between wide open highway, and parking lot highway, rush hour traffic mpgs.

JeepFreak21 · Jun 27, 2009

My WJ lost 1.5 MPG at highway speeds (65-70) w/ the AC on... interestingly, it lost about 1 MPG with both front windows down at the same speed.
Billy

bmpxj · Jun 28, 2009

tbburg said:
I get about 18-19 highway, AC use doesn't seem to make a big difference. Here's something you might want to look at though:
JP magazine

Thanks...I forgot about that article. I have noticed some squealing...usually on start-up and if I put it on max a/c. I passed it off as the belt, but I'll check the pulley, etc.

cj11 · Jun 28, 2009

A/C is that what the four switches on the door do when I use them it does not seem to mess with my MPG.:doh:

RenegadeT · Jun 28, 2009

cj11 said:
A/C is that what the four switches on the door do when I use them it does not seem to mess with my MPG.:doh:

I guess you never heard of aerodynamic drag?

POLAR_JEEP_04 · Jun 28, 2009

is this mod tech?

TYphoon · Jun 28, 2009

bmpxj said:
Thanks...I forgot about that article. I have noticed some squealing...usually on start-up and if I put it on max a/c. I passed it off as the belt, but I'll check the pulley, etc.

Mine does the exact same thing! Makes me wonder :huh:

Ecomike · Jun 28, 2009

RenegadeT said:
I guess you never heard of aerodynamic drag?

I have, it's a real DRAG!

TYphoon · Jun 28, 2009

Ecomike said:
I have, it's a real DRAG!

:roflmao:

Muad'Dib · Jun 29, 2009

bmpxj said:
Anybody else having trouble finding the Champion Truck Plugs?

RockAuto.com

bmpxj · Jun 30, 2009

POLAR_JEEP_04 said:
is this mod tech?

I'm not asking about a stock Jeep, I'm asking about a modified Jeep and the mpg numbers will vary between the two. Is it tech..no, but it isn't OE either...but I would expect such a question from someone from Columbus (and don't say it's Westerville, not Columbus...it's all the same).

bmpxj · Jun 30, 2009

Muad'Dib said:
RockAuto.com

Thanks...I went local Napa, AZ, Auto Value and whoever else is around and they can no longer get the truck plugs...they are getting renumbered to the double platinums.

bmpxj · Jun 30, 2009

cj11 said:
A/C is that what the four switches on the door do when I use them it does not seem to mess with my MPG.:doh:

Read Post #4...driver's window is not working right now...but thanks for contributing absolutelty nothing useful to this thread.

winterbeater · Jun 30, 2009

May as well fix the window. Easy to search for methods. LOL.

Don't forget though. that the reformulated summer gas reduces fuel economy. You didn't set up the question to ask if AC uses more than the windows open or AC used more than the windows closed.

How much does your mpg drop running the a/c?

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