Did my winch just kill my gas mileage? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 21 Old 08-26-2012, 01:31 PM Thread Starter
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Did my winch just kill my gas mileage?

I have a '12 2DR Rubicon with about 2400 miles on it. Recently, I installed a winch (metal cable), aluminum River Ridge XHD stubby bumper (very light) and RR front skid plate (steel). My guess is the net weight gain on the front end was about 100 to 120 lbs. Up until I added the accessories, I was getting the window sticker mileage 21/17. Now, I'm lucky to get 17/15 or less. Are these vehicles that sensitive to a weight change?
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post #2 of 21 Old 08-26-2012, 01:39 PM
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I have a '12 2DR Rubicon with about 2400 miles on it. Recently, I installed a winch (metal cable), aluminum River Ridge XHD stubby bumper (very light) and RR front skid plate (steel). My guess is the net weight gain on the front end was about 100 to 120 lbs. Up until I added the accessories, I was getting the window sticker mileage 21/17. Now, I'm lucky to get 17/15 or less. Are these vehicles that sensitive to a weight change?
Negative, it wasn't the weight, it was the increase in drag that affected you. By adding the stubby and winch while removing the plastic valance you altered the drag coefficient of the vehicle. Having the tires exposed and the air being directed differently than the factory intended definitely affects the fuel mileage.

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post #3 of 21 Old 08-26-2012, 01:39 PM
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Are these vehicles that sensitive to a weight change?
Not that sensitive. How long did it take you to average 21/17? How many tanks have you gone through?

You'd see a decrease, but not that substantial.

I agree with the air drag difference may be what's getting you.

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post #4 of 21 Old 08-26-2012, 02:14 PM
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Yep totally the winch! Go ahead and box that dude back up and ship it to me and you will have mall rated MPG again! Good thing I found this post it could have also bent your axles too!
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post #5 of 21 Old 08-26-2012, 02:29 PM
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I agree with austinjeepr... but sent it to me instead, I already have the poor mileage on my jeep (average over the life time of having the jeep is 13.904, lowest was 9.863 maximum was 19.602 although lately I have been in the 15 to 16 range lol)
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post #6 of 21 Old 08-26-2012, 03:01 PM Thread Starter
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Negative, it wasn't the weight, it was the increase in drag that affected you. By adding the stubby and winch while removing the plastic valance you altered the drag coefficient of the vehicle. Having the tires exposed and the air being directed differently than the factory intended definitely affects the fuel mileage.
Interestingly, the drag coefficient notion came to mind as I was driving back from San Diego yesterday. I was going to ask about it, but completely forgot. It makes much more sense than the added weight. However, I would think it would be more of a factor at highway speeds, and have less impact around town.
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post #7 of 21 Old 08-26-2012, 03:48 PM
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Interestingly, the drag coefficient notion came to mind as I was driving back from San Diego yesterday. I was going to ask about it, but completely forgot. It makes much more sense than the added weight. However, I would think it would be more of a factor at highway speeds, and have less impact around town.
It wouldn't make that huge of a drop, but it will affect the average a bit. When my Sport was out of the box new I saw an average of 18-19 mpg between highway/city combined. After hacking off the crash bar, adding the JCR stubby and 8500lb winch, and the small lift with rubi tires I am happy when I see the combined average hit 17mpg. It's usually around 16. Like Goody said, i'd dump the average calculator (clear it) and start over to see where you are at with the changes after a few hundred miles of combined driving.

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post #8 of 21 Old 08-26-2012, 04:56 PM
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post #9 of 21 Old 08-27-2012, 12:07 AM
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If your worried about mpg you might as well sell it now. It only gets worse the bigger it gets!!!
( well.... For the jeep anyways!)

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post #10 of 21 Old 08-27-2012, 12:18 AM
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If your worried about mpg you might as well sell it now. It only gets worse the bigger it gets!!!
( well.... For the jeep anyways!)
What he said.

Oh. Sell your Jeep too.

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post #11 of 21 Old 08-27-2012, 03:31 AM
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When I am daily driving mine I get one day per tank....have no idea what the MPG is but it sure is FUN!!

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post #12 of 21 Old 08-27-2012, 05:57 AM
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I honestly echo the "who cares" sentiment. I didn't buy the Jeep for fuel efficiency. I bought it to enjoy offroad. In fact, I traded a fuel efficient Scion in for it. My wife has an extremely fuel efficient vehicle now. So if we need to drive a long distance we drive her vehicle.

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Some folks are fine with being screwed over, perhaps finding confrontation to be more stressful than just living with whatever the problem is. These are excellent consumers, manufactured to the finest specifications.
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post #13 of 21 Old 08-28-2012, 09:13 AM Thread Starter
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Why does fuel economy and offroad fun have to be mutually exclusive? I owned a '00 TJ prior to buying my '12 Rubicon. It was lifted, regeared, big tires, etc., and was yielding 15/13 mpg. So, why can't a new Jeep (10 years newer) with an improved engine provide better fuel economy? I think it's pretty pathetic that with the advances in automotive technology, gas mileage isn't much better than 10 years ago. Sure, I can afford the gas, but why should I settle? I want it all...good fuel economy and fun!!! :-)
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post #14 of 21 Old 08-28-2012, 09:19 AM
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Why does fuel economy and offroad fun have to be mutually exclusive? I owned a '00 TJ prior to buying my '12 Rubicon. It was lifted, regeared, big tires, etc., and was yielding 15/13 mpg. So, why can't a new Jeep (10 years newer) with an improved engine provide better fuel economy? I think it's pretty pathetic that with the advances in automotive technology, gas mileage isn't much better than 10 years ago. Sure, I can afford the gas, but why should I settle? I want it all...good fuel economy and fun!!! :-)
Because the EPA wont let us have a factory diesel JK. That's why you cant have power and economy. I've been doing 15mpg on 37s..

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post #15 of 21 Old 08-28-2012, 09:27 AM
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How's your cylinder head, any unusual ticking? I hear the mileage goes south when the head goes bad.

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Why does fuel economy and offroad fun have to be mutually exclusive?
Because it's more fun for them to say "buy a prius".

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post #16 of 21 Old 08-28-2012, 09:37 AM
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Originally Posted by JKCTAZ View Post
Negative, it wasn't the weight, it was the increase in drag that affected you. By adding the stubby and winch while removing the plastic valance you altered the drag coefficient of the vehicle. Having the tires exposed and the air being directed differently than the factory intended definitely affects the fuel mileage.
X2 on that. You have changed the angle of the dangle and now you are in true Jeep mpg land. Welcome

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post #17 of 21 Old 08-28-2012, 10:31 AM
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Quote:
Originally Posted by RussL View Post
Why does fuel economy and offroad fun have to be mutually exclusive? I owned a '00 TJ prior to buying my '12 Rubicon. It was lifted, regeared, big tires, etc., and was yielding 15/13 mpg. So, why can't a new Jeep (10 years newer) with an improved engine provide better fuel economy? I think it's pretty pathetic that with the advances in automotive technology, gas mileage isn't much better than 10 years ago. Sure, I can afford the gas, but why should I settle? I want it all...good fuel economy and fun!!! :-)
Part of the tech involved in improved mileage is aerodynamics. One of the reasons the Jeep is iconic is its traditional look. Bricks don't do well in wind tunnels.

Ryan

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post #18 of 21 Old 08-28-2012, 11:36 AM
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Weight. How much did your TJ weigh? How about your JK?

Safety stuff, creature comforts, etc.

And I don't recall where the 3.8 or 3.6 is "better" than the 4.0. The only person they're better for is Chrysler. The 4.0 couldn't get the emissions numbers they needed. They didn't give us the minivan motor because it was better.

08 Jeep Wrangler Unlimited Rubicon: lift, wheels/tires, bumpers, skids, sliders, winch, lights, cb. All the normal stuff, plus some.......
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post #19 of 21 Old 08-28-2012, 02:57 PM
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Did my winch just kill my gas mileage?
If she's driving it more and flooring it all the time, then yes.

Oh, you said *wench*....

What the guys said above...aerodynamics. Despite the JK's shape, it can actually get worse. These things are pigs too, heavy as hell. View every weight-adding mod with fear and trepidation.

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post #20 of 21 Old 08-28-2012, 08:42 PM Thread Starter
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Yeah, the box is definitely not the epitome of aerodynamic design, for sure. I still have some armor to put down under, too. I'm using aluminum wherever I can. It's pricey, but I'm trying to keep the tank as nimble as possible.

Last edited by RussL; 08-28-2012 at 08:44 PM.
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post #21 of 21 Old 08-28-2012, 08:48 PM
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Yeah, the box is definitely not the epitome of aerodynamic design, for sure. I still have some armor to put down under, too. I'm using aluminum wherever I can. It's pricey, but I'm trying to keep the tank as nimble as possible.
You could bolt a Prius to the frame horns and mount the winch to that to regain your fuel efficiency...

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