Improve mpg.. - JeepForum.com

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post #1 of 73 Old 07-21-2011, 11:24 PM Thread Starter
Flipcyd7
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2000 TJ Wrangler 
 
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Improve mpg..

Its a Jeep..I know that, but what are the most efficient mods for improving mpg. I have a 2000 TJ Sport 4.0 I6. 33 12.50s and 3in lift. Thought about K&N cold air intake but because of this site have decided against. Already have Poweraid TBS installed. Any tips are appreciated. First time Jeep owner but will own nothing else ever.

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post #2 of 73 Old 07-22-2011, 01:44 AM
Boodyrider
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Short answer: buy a daily driver that gets good fuel economy. Prius comes to mind. Otherwise, put Jeep back to stock and do a tune up. Throw away the TBS.

97 TJ Sport - 4.0/HP D30 w ARB/8.8 w LS/4.88s; 35s and flat fenders on 2.5 lift

84 CJ7; frame off restoration in progress.

The technical advice you get from me here is worth exactly what you paid me for it. Warranty issues will be reimbursed at double what you paid me for the advice.
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post #3 of 73 Old 07-22-2011, 01:59 AM
neatocj
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Similar to what ^said....the best mod for a jeeper to get better mileage is to not drive it.

that or have small tires, keep the top and doors on and be nice to the skinny

Your not pushing the limits of your jeep until your on your side, then something breaks and it's time to go home.
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post #4 of 73 Old 07-22-2011, 05:39 AM
hdsport
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My 2000 TJ

I have a 2000 TJ, 4.0L, 5-speed, stock 3.07's, 235's, 105,000 mi and all stock.
I get 18-20 mpg all of the time. Got better until they mandated 10% ethanol in gas.
Compared to what I see on this Forum, this is pretty good mpg's.
I don't put my foot in it or do anything stupid as I drive. She treats me good, I treat her good.
No K&N, throttle body spacer, etc.
Today, a new power steering gear....can't stop the current leak.
Was 102 deg F yesterday, more today...can't wait to do some doors off touring today.

2001 Winnebago Adventurer 32v Motor Home
2008 Jeep GC Limited Toad, 4.7 L V-8, QTII
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post #5 of 73 Old 07-22-2011, 05:23 PM
soldierofchrist77
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Bigger tires without matching gears will greatly decrease gas mileage. Were your gears upgraded with your tires? You should be running at least 4.10s with your 33s.
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post #6 of 73 Old 07-22-2011, 05:53 PM
t-fids
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Best advice I was given was don't drive anywhere fast. Mine's a 98 4 cyl 2.5L with 33's and 4.10's. It's a jeep and we all know they mall crawl, so, in saying that, sport the mall crawl! Don't go anywhere in a hurry, if it's stick, shift at an economic RPM. I'm surprised with my $60-70 tank (CND), that it lasts me 7-9 days.

1998 TJ, 2.5L 4 Cyl, 4.10's, 3" Zone Suspension, 33x12.5x15 Hankook Dynapro MT, Pro Comp 52 steelies.
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post #7 of 73 Old 09-09-2011, 04:07 PM
chopstix333
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I'm with t-fids... I also got a 98 2.5L on 33s and stocks gears and easing off the gas can save some $$$! Besides, you got a lift and big tires.. no one can bully you on the road.. so driving slower than traffic ain't gonna hurt ya

'98 Jeep Wrangler 2.5L | 4" Pro Comp Lift | 33x12.5x15 Dunlop Mud Rovers | Two 10" Polk Audio Subwoofers | 2 Amps (800w Eclipse and Alpine MRP-1000 Mono) | Kenwood Head Unit | Ham Radio w/ Comet SBB-7 Antenna (Call Sign: KK4BUE) |CB Radio | Hella Vision Plus Conversion with 50w 6k HID bulbs | Lotta Lights |
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post #8 of 73 Old 09-20-2011, 09:07 AM
GromMudder757
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i run the speed limit, and i dont speed in my jeep ever. I get 20 mpg with my setup 2.5l 4.5" lift, pro comp 33s. First thing first replace ur fuel filter!!! makes a big difference! i also shift at 2000 between every shift! keep ur right foot out of it

My first jeep - 1992 YJ, 2.5, 5 spd, Rough Country 4.5" suspension lift, Brush Bar, 33x12.50 Dakota ATs, Uniden 510 cb
My mom, and brother have really helped me a lot with this project, if it wasnt for them my jeep would be in peices!
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post #9 of 73 Old 09-20-2011, 11:01 AM
t-fids
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Quote:
Originally Posted by GromMudder757
i run the speed limit, and i dont speed in my jeep ever. I get 20 mpg with my setup 2.5l 4.5" lift, pro comp 33s. First thing first replace ur fuel filter!!! makes a big difference! i also shift at 2000 between every shift! keep ur right foot out of it
Grom, any fuel filters to recommend? Also, how expensive and can you do this yourself? What kind of differences have you noticed?

1998 TJ, 2.5L 4 Cyl, 4.10's, 3" Zone Suspension, 33x12.5x15 Hankook Dynapro MT, Pro Comp 52 steelies.
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post #10 of 73 Old 09-20-2011, 12:55 PM
sequimbillyheep
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13.4MPG on my 97. I run 4.56s and 33s, 35s off road. Im not complaining about my MPG, cause i expect it.

97 TJ stump crawler. locked. not modified too the extreme but does what I want when I want unless its passing on the freeway!
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post #11 of 73 Old 09-20-2011, 02:27 PM
sgtmajor138
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Right at 17 mpg with 4.0L, Auto, stock gears, 33s, and a fresh set of plugs. The fresh plugs helped a bunch.

'09 JKU Wrangler - Seize the Opportunity!
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post #12 of 73 Old 09-22-2011, 11:02 PM
GromMudder757
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I use the napa gold series it cost me 12.97 on my shop acc with them and it made a huge difference. I recommend doing a tune up on the regular because the plugs tell the story of the motor. That's all there is too it, you have to read the plugs! I got 22.3 mpg on the highway today I was excited

My first jeep - 1992 YJ, 2.5, 5 spd, Rough Country 4.5" suspension lift, Brush Bar, 33x12.50 Dakota ATs, Uniden 510 cb
My mom, and brother have really helped me a lot with this project, if it wasnt for them my jeep would be in peices!
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post #13 of 73 Old 09-22-2011, 11:39 PM
Drix
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I notice a lot of people buying Throttle body spacers... DONT! for the love of god and physics dont do it. Throttle body spacers came from Carbs, they made the carb sit up a bit higher allowing fuel and air a bit more time to mix. kinda like putting on a taller intake.

Unless you Have a TBI set up you could make out. on modern EFI engines where fuel is injected through the rail and into the manifold your not gonna have any effects.

The only way to increase your MPG will

1. Control the foot that pushes the skinny pedal.
2. Keep up on regular Maint.
3. Buy small cheap old 4cyl DD (This is what I did) Plus I paid less for the Corolla then what it will cost me to replace my tires after they wear away on the pavement.

95' YJ 4" lift 33"x12.5r15's D30/8.8 locked with 4:88's
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post #14 of 73 Old 09-23-2011, 09:48 AM
GromMudder757
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Quote:
Originally Posted by Drix View Post
The only way to increase your MPG will

1. Control the foot that pushes the skinny pedal.
2. Keep up on regular Maint.
3. Buy small cheap old 4cyl DD (This is what I did) Plus I paid less for the Corolla then what it will cost me to replace my tires after they wear away on the pavement.
hahah i agree 100 percent! I bought a 88 zuk sami for 500 runs drives inspected!! Only 2 small rust spots, 9" lift, 33s, 5 speed, no exhaust, 24.6 mpg if im easy on it!!

My first jeep - 1992 YJ, 2.5, 5 spd, Rough Country 4.5" suspension lift, Brush Bar, 33x12.50 Dakota ATs, Uniden 510 cb
My mom, and brother have really helped me a lot with this project, if it wasnt for them my jeep would be in peices!
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post #15 of 73 Old 09-30-2011, 04:50 PM
TLATEOTW
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try using scangauge II, to monitor your current MPG, it'll help.
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