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Unread 05-22-2013, 11:41 AM   #16
Jeepguy4276
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Join Date: Apr 2013
Location: Fargo, North dakota
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Something added to the roof, even lights, can effect gas mileage by 2-3 mpg's. i've been getting about 18 on the highway. I've never expected a 4x4 truck to average more than 16-18. I'm tjrilled when i do get better but don't complain unless i drop below 16. That includes my suburbans, pick ups, etc. my brother's new dodge power wagon with the hemi averaged 11 when we drove a 2000 mile trip. That i complained about.

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Unread 05-23-2013, 09:36 AM   #17
DaveJKJ
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Quote:
Originally Posted by tommudd View Post
I get about the same lifted as I did when it was stock what little bit I lost by lifting is offset by not looking like every other KJ out there
Yours must also be sprinkled with "tinkerbell magic pixie dust" Tom...
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Unread 07-17-2013, 04:15 PM   #18
Wilson7397
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I replaced the left side hub bearing because it was making some noise, it sounded like loud tires, I replaced the right side about 15k miles ago, I've just returned from 1000 mile trip to North Carolina and back, mostly hills and mountains, highway , 70-75 mph ,bags on the roof rack and I averaged 17.5-18.25 mpg, on flat highway it should do 19mpg. Big improvement over the 16mpg I was averaging on my Florida trip in may.
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Unread 07-18-2013, 12:56 AM   #19
Eicas
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My stock '06 KJ Limited with 85K on the odometer averages 24 mpg at 65, 15 around town, and 20 per tank. I run Valvoline synthetic oil in the differentials and engine with their ATF+4 in the transfer case and transmission. I use Autolite XP5224 Iridium plugs gapped to .040 inch. I commute some 80 miles a day and those numbers are very consistent with 60% freeway and the rest city streets with lots of hills. I drive with the traffic which is about 5+ mph above the limit.
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Unread 07-18-2013, 12:19 PM   #20
kjrenegade03
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2003 KJ Liberty 
 
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Location: Attleboro, MA
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17.3mpg mixed driving all stock renegade package which i would assume would be less aerodynamic with the lights on top. Actually with my kayak on the roof i go up by .2-.4 mpg, must be the wedge shape!
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Unread 07-18-2013, 12:32 PM   #21
tommudd
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04, 187,000 miles, 32 inch tires, 4.50 inch lift, lots of extra weight with steel bumpers front and rear, skids, roof rack with 4 lights etc, etc
3 people and a dog, luggage AC blasting
21.3 average 270 mile trip with 220 of it at 75 MPH
Next trip 3 people dog etc along with a home built 5X8 trailer with Garden tractor, gas cans etc 18.8 average
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Unread 07-18-2013, 05:30 PM   #22
02libbyfirstcar
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those 4.10's really make a big difference huh?
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Unread 07-18-2013, 05:38 PM   #23
tommudd
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Quote:
Originally Posted by 02libbyfirstcar View Post
those 4.10's really make a big difference huh?
Yep!
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Unread 07-18-2013, 08:35 PM   #24
streetglideok
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Too tall of gearing can hurt as much or more than too short of gearing, so tommudd's results do not shock me at all. I'd be curious if my mileage went up if I ditched the 3.55 gears in mine. I've gotten as good as 22mpg in mine, but I'm curious to see how fast I'm burning gas going back and forth to monument every day now.
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Unread 07-20-2013, 10:40 PM   #25
tjkj2002
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Heck my gas gauge drops a 1/8 when I put my KJ in gear,but then again all 210 squirls are trying to move 6000lbs+ in thin air at 6200'.
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Unread 07-21-2013, 07:33 AM   #26
DaveJKJ
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Quote:
Originally Posted by tjkj2002 View Post
Heck my gas gauge drops a 1/8 when I put my KJ in gear,but then again all 210 squirls are trying to move 6000lbs+ in thin air at 6200'.
But you gotta admit your KJ is a "little" different.

As far as gas mileage goes I barely got 18mpg through the mountains yesterday. Had the a/c cranking cause it was hot......hot even in the mountains. Going downhill playing with the EVIC I had it reading 99mpg and picking up speed with my foot off the gas and downshifted into drive for a little engine brakeing..... ......but apparently the pig uses much more fuel going uphill than the downhill grades can make up for............
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Unread 07-21-2013, 08:56 AM   #27
streetglideok
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How strange, I usually get pretty good mileage especially in the mountains. Last trip I took over La Veta pass, etc, I got close to 22mpg. Now here is the thing, I'm a cdl holder with 2 years otr experience, with a 6speed KJ. It makes it a lot easier to manage things than the autos.
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Unread 07-21-2013, 09:04 AM   #28
tommudd
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Quote:
Originally Posted by streetglideok View Post
How strange, I usually get pretty good mileage especially in the mountains. Last trip I took over La Veta pass, etc, I got close to 22mpg. Now here is the thing, I'm a cdl holder with 2 years otr experience, with a 6speed KJ. It makes it a lot easier to manage things than the autos.
Makes a difference in how you drive, approaching hills/stop lights etc . I've had my CDL since 1986 and logged a lot of miles back and forth across the US back when I drove. I still drive like I have 40,000 lbs following me
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Unread 07-21-2013, 06:09 PM   #29
streetglideok
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Dang Tom, you are an old man,lol. I obtained mine in '05. Once you drive the big trucks, you actually learn how to drive. Up to then, its all go-karts and hotwheels. Took me a while to break the habit of double clutching my downshifts, and careful thought to remember to use the clutch on upshifts. Driving correctly makes a huge difference in getting 4mpg and getting 7-8mpg in the trucks.
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Unread 07-21-2013, 06:47 PM   #30
tjkj2002
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Quote:
Originally Posted by DaveJKJ View Post
But you gotta admit your KJ is a "little" different.

As far as gas mileage goes I barely got 18mpg through the mountains yesterday. Had the a/c cranking cause it was hot......hot even in the mountains. Going downhill playing with the EVIC I had it reading 99mpg and picking up speed with my foot off the gas and downshifted into drive for a little engine brakeing..... ......but apparently the pig uses much more fuel going uphill than the downhill grades can make up for............
Around here where I live I can barely manage 12-13mpg's on the highway locally but when I went home to SD I averaged 17mpg's at 69mph(2900rpm's) with the AC on but going down hill pretty much the whole way.Only 14mpg's on the way back but for about a 75 mile stretch on I-80 on the way back I saw 26mpg's with a 45-65mph tail wind,and hail and rain.Even spotted a funnel cloud.
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