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Add-ons that will improve gas milage?
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Author:  Wnahikian [ Mon Mar 22, 2010 10:58 am ]
Post subject:  Add-ons that will improve gas milage?
What are some add-ons (good ones) that would add to my mpg? I know an air intake would, but how much would it actually help me? Also what add-ones will help my hp? (other than a chip) At this point I am not ready to add a chip on my jeep with only 7k miles :D

Thanks all
Author:  DirtyKK [ Mon Mar 22, 2010 11:08 am ]
Post subject:  Re: Add-ons that will improve gas milage?
i havent really noticed any change in mileage with a chip and intake. :? a muffler should change a couple mpgs and im hoping once i find a quiet(ish) muffler to change mine out that the intake and chip will help a little more also. :roll:
Author:  Wnahikian [ Mon Mar 22, 2010 11:18 am ]
Post subject:  Re: Add-ons that will improve gas milage?
DirtyKK wrote:
i havent really noticed any change in mileage with a chip and intake. :? a muffler should change a couple mpgs and im hoping once i find a quiet(ish) muffler to change mine out that the intake and chip will help a little more also. :roll:

Ahh thats crappy :banghead: I drive a lot of highway and want something so I dont need to fill up as much, I hope someone else has found the way to go :roll:
Author:  DirtyKK [ Mon Mar 22, 2010 11:20 am ]
Post subject:  Re: Add-ons that will improve gas milage?
Wnahikian wrote:
DirtyKK wrote:
i havent really noticed any change in mileage with a chip and intake. :? a muffler should change a couple mpgs and im hoping once i find a quiet(ish) muffler to change mine out that the intake and chip will help a little more also. :roll:

Ahh thats crappy :banghead: I drive a lot of highway and want something so I dont need to fill up as much, I hope someone else has found the way to go :roll:


i hope someone else chimes in also. i keep my tires to an equal pressure and have tested a few tanks with different pressures. i also changed my spark plugs out to ngk iridiums and still no change.
Author:  Wnahikian [ Mon Mar 22, 2010 11:24 am ]
Post subject:  Re: Add-ons that will improve gas milage?
Let the people chime in!
Ill sit back and watch.. :POPCORN:
Author:  geene519 [ Mon Mar 22, 2010 2:29 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
sell it an buy an economy car... :shock: :lol:

the only thing i can see maybe slightly improving it, is to get a custom tune for the truck...with the intake and other misc little things. that will be the best bet to gain something. but honestly its not worth it, driving a jeep is like driving a brick down the road, nothing aerodynamic about it...lol
Author:  Diggerfreek [ Mon Mar 22, 2010 2:42 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
Just like geene519, you can only get some much out of a brick on wheels...

Best advice I can give you short of trading it in is to get a low resistance set of tires and lower the jeep with a eibach nut scrapper kit :-)r
Author:  Elt31987 [ Mon Mar 22, 2010 2:59 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
Diggerfreek wrote:
Just like geene519, you can only get some much out of a brick on wheels...

Best advice I can give you short of trading it in is to get a low resistance set of tires and lower the jeep with a eibach nut scrapper kit :-)r



OUCH!!!!! I like being up high ty very much lol
Author:  ihatemybike [ Mon Mar 22, 2010 3:16 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
Here's what I'm doing to increase MPGs in my vans. These will also work with the Jeeps.

Warm up
Sure I let the engine idle, but it's in gear pulling out of the drive. Once I turn onto the street I accelerate to 10 mph, then neutral coast down the block around the corner, downhill one block, stop at a stop sign, put it back in gear then go.

Accelerating
Once a tank I'll really get on the gas to clear out carbon, usually first interstate on ramp after a fill up. Don't feel like it's wasting too much gas that way. All other times the I try to keep RPMs under 2K and the throttle position sensor reading less than 25%. I try not to accelerate going uphill, if it's necessary it's only up to the speed limit then the cruise is set. I'll add my normal 5 mph over once the road levels or turns downhill.

Cruise Control
Interstate or local roads I use it. Just so long as there isn't a stop sign ever block or two.

Lower speed
I used to go faster than most traffic. Now 5 mph over speed limit up to 70 mph, then speed limit only. The interstates in Chicago's burbs are 55 mph zones. I do 60 mph, which compared to the rest of traffic is slow, but not obnoxiously so. I just sit in the right lane with my cruise on.

HVAC
Only time the AC gets turned on is when Jayme is in the van and requests it. All other cooling is done with the vents blowing 3/4 speed and the front windows cracked 1.5" (to the bottom of the window wing things) above 40 mph or windows down all the way below 40 mph.

Draft semis with box trailers
2.5 to 3 seconds back appears to be the mpg sweet spot. I use a CB and communicate with the truck's driver when I feel it's needed. I'll increase my speed to 65 mph for a good draft. Trucks with tandem trailers are even better to draft.

Neutral coasting
I put my vans in neutral a lot. Interstate exit ramps, I almost never use the brakes, I know how far I need to coast the van before the ramp to get the speed down. City traffic, I give myself space to use neutral instead of the brakes. Lights and stop signs, I coast to these almost never touching the brakes till I'm below 20 mph. Hills, near Chicago engine braking doesn't matter too much. If I'm going down a hill and see the TPS hit zero into neutral I go. If the van increases speed down the hill I'll keep it in neutral past the bottom until it's 1 mph above my normal 5 mph over, at which point I put it back and gear and activate the cruise.

Engine off stop lights
I learned the cycles of the stop lights I frequent. If a light has a long cycle, I turn the engine off until just before my light turns green.

Parking
If I can find a spot that allows me to pull straight through so I don't have to use reverse when I leave I'm using it, otherwise I back into the spot with a warm engine.

Waiting
When I leave work at the same time as everyone else I'll sit in my spot with the engine off until the driveway clears. I only start the engine when I can roll out the drive without waiting for others to get out of my way.



The future
I'm mulling about the idea of a truncated boat tail to decrease the wake behind the van. The math shows that a 2' long tail would decrease the wake by about 54%.

Partial grill block to increase aerodynamics, removable for towing, hotter weather, and hillier than normal terrain.

Huge lower air dam, made out of used conveyor belt material. This will sit within 2" of the ground, but be flexible should it hit the ground.

Getting a beaded seat cover to assist with driver cooling.
Author:  stubble88 [ Mon Mar 22, 2010 4:16 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
i would get a cheap beater to commute in
a 22re toyota would work good.
Author:  ATXKJ [ Mon Mar 22, 2010 4:25 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
Diesel works really well :D :D
Author:  rav [ Mon Mar 22, 2010 7:00 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
to the OP, remove your light bar, you are DEFINITELY loosing MPG's. If you say you are not then something is wrong, it is a very well documented fact that putting anything on the roof line only increases drag. Like others have said JEEP and mpg's are inversely proportional.

I love my liberty but hate it as far as mpg is concerned. Now that the weather is warming up, i will be riding a 115 mpg scooter for my work (live 5 min from my work place). I know that will not work for people who have to commute on a highway.
Author:  Jeepin_it_real [ Mon Mar 22, 2010 9:08 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
intake and exhaust are the best bolt ons... don't remove the bottom air darn... make a ram air... try to lower under the hood temps so cutting open the hood and putting vents is an option... also like had been stated try and coast often, our jeeps do fairly well around 62-68 mph... also make sure tire pressure is good... use a highway tire ( some tires are designed for best mpg)... get a scan guage two, it helps me determine a lot of things which will help determine your best mpg, plus it helps you store all that info...

what also helps is less weight... if you trust you don't need the spare kiss it goodbye, if you dont need the rear seats. good bye, if you dont have a crazy commute fill your tank up only half way ( more gas equals more weight and at about 6.25 pounds per gallon for 87 octane, you can drop a decent amount of weight), like was said remove light bars or racks or skids.

i switched the route i was going with my truck, and i considered lowering it for a while but lower means more aerodynamic and aerodynamic means more mpgs...( you dont need ot have big rims just lower it, but if you want rims i'm selling mine)
Author:  Jeepin_it_real [ Mon Mar 22, 2010 9:10 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
oh diff plugs help as said, but dirty kk the reason your not getting more pgs with the intake is your exhaust if you haven't changed it yet... all this air is coming in but it has no where to go since the stock exhaust is a restrictive tanker
Author:  Jeepin_it_real [ Mon Mar 22, 2010 9:11 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
oh and as a side note about the aerodynamics of our vehicle ( this is where i need digger to chime in with the sticker) , well they are overrated
Author:  Diggerfreek [ Mon Mar 22, 2010 9:18 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
Jeepin_it_real wrote:
oh and as a side note about the aerodynamics of our vehicle ( this is where i need digger to chime in with the sticker) , well they are overrated



Image
Author:  Jeepin_it_real [ Mon Mar 22, 2010 9:26 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
good timing sir haha
Author:  Diggerfreek [ Mon Mar 22, 2010 9:35 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
I am almost always watching :shock:
Author:  tjkj2002 [ Mon Mar 22, 2010 9:36 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
Jeepin_it_real wrote:
oh diff plugs help as said, but dirty kk the reason your not getting more pgs with the intake is your exhaust if you haven't changed it yet... all this air is coming in but it has no where to go since the stock exhaust is a restrictive tanker

Actually after a few drive cycles your mpg's will go back to what they used to be since the PCM will "learn" around them and adjust to get back into it's pre-set specs.Opening up the intake and exhaust is worthless without the programming and internal engine mods to take advantage of them Only reprogramming the PCM/TCM can you achieve better mpg's,but......................................................


"Jeep" and "good mpg's" just don't belong in the same sentence.
Author:  Jeepin_it_real [ Mon Mar 22, 2010 10:53 pm ]
Post subject:  Re: Add-ons that will improve gas milage?
well thats why i'm getting retuned by B&G haha... but having something like the jetchip helps to avoid your engine relearning... plus if you reset your car( takr the neg off) and beat on it for a lil, the pcm/tcm will learn the harder shifts etc required to have a higher performace... i've actually tested the theory out
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