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Unread 07-21-2013, 05:51 PM   #31
tjkj2002
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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.
Coming down Vail pass(or any of those passes) I don't use a drop of gas,also have to keep switching OD back on the gain speed back.On those extreme downhill stretches my coolant temp will also drop to 160 degrees sometimes as the engine isn't producing any heat since no gas is being pumped into the combustion chambers.

Who ever say's that auto's have terrible compression braking should take mine on one of those passes.

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Unread 07-21-2013, 07:38 PM   #32
streetglideok
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Yeah, but yours drags so much air, it's its own parachute!
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Unread 07-21-2013, 08:04 PM   #33
tommudd
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Quote:
Originally Posted by streetglideok View Post
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.

CDL in 86 actually drove before that even, didn't need a CDL license then, got my drivers license in 1970 so yes I am that old
Clutch? who uses them
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Unread 07-21-2013, 08:23 PM   #34
streetglideok
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Only for the downshifts. You look like a 'tard when your jakes are on and you miss a gear because the clutch didn't kill it for the shift,lol
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Unread 07-21-2013, 08:50 PM   #35
tjkj2002
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Originally Posted by streetglideok View Post
Yeah, but yours drags so much air, it's its own parachute!
Not much more then a stock KJ since it is a KJ.Plus you gotta factor in my KJ weighs 2000lbs more then a stock KJ so the effect of gravity far out weighs the effect of wind resistance.
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Unread 07-21-2013, 08:54 PM   #36
MoparMech
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A stock KJ barely gets more than 16 mpg. Chrysler ignition systems HATE and I mean HATE E3 Spark plugs. Use the recommended ones.
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Unread 07-21-2013, 09:10 PM   #37
tjkj2002
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Originally Posted by MoparMech View Post
A stock KJ barely gets more than 16 mpg. Chrysler ignition systems HATE and I mean HATE E3 Spark plugs. Use the recommended ones.
Not true at all.When I was mostly stock(no lift) I could get better then 23mpg's on the highway at 78mph,right before the SFA swap and heavily modded I still could get just shy of 22mpg's on the highway at 78mph.
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Unread 07-21-2013, 09:27 PM   #38
PoundHipster
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Couple weeks ago drove from Colorado to Upstate NY and averaged between 21-24 mpg. Relatively fresh spark plugs (less than 10k old), took the roof basket off, and little weight inside. I like to think I *really* got 24 at one point, but it is so hard to tell with my KJ. I have that fuel splash back problem where the pump doesn't click off, so I think when I fill up I actually fill up the filling tube (can't remember real name). so that throws the calculations of a bit.
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Unread 07-21-2013, 09:28 PM   #39
streetglideok
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I'm basically bone stock and I can get into the 20s, no problem at all. I've gone close to 400 miles on a tank and had some left. Its a lot in the tires you run, the fuel you choose, and most importantly, the nut behind the wheel.
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Unread 07-21-2013, 09:32 PM   #40
dboyinaz
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2000 xj 3.5 inch lift on 31s. I get 15-16 overall mpg
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Unread 07-21-2013, 11:30 PM   #41
tommudd
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Quote:
Originally Posted by MoparMech View Post
A stock KJ barely gets more than 16 mpg. Chrysler ignition systems HATE and I mean HATE E3 Spark plugs. Use the recommended ones.
Stock and barely gets 16 ?
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Unread 07-22-2013, 04:35 AM   #42
tjkj2002
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Originally Posted by dboyinaz View Post
2000 xj 3.5 inch lift on 31s. I get 15-16 overall mpg
That's nice but we are talking about a KJ in the KJ section,not a XJ.
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Unread 07-22-2013, 09:29 AM   #43
DaveJKJ
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Quote:
Originally Posted by streetglideok View Post
I'm basically bone stock and I can get into the 20s, no problem at all. I've gone close to 400 miles on a tank and had some left. Its a lot in the tires you run, the fuel you choose, and most importantly, the nut behind the wheel.
Same here when I was stock and on flat highway. Even now I can do it on flat highway for a little bit but then come the hills and the EVIC readings start to go down and I end up at 18 or something or worse sometimes....LOL Depends on where/what roads I am on. When the trucks are going 40-45 in the truck lanes with their flashers on you know you are on a grade.
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Unread 07-23-2013, 10:52 AM   #44
BIG_J
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Well I'm driving 26.3 miles each way to work and home. I tried the e3 plugs. My mileage is 14.3 and I sit in my Jeep with the ac running on lunch. I also have 245/75/16 dura tracks, and 4.5 inches of lift on an 05. I'm going to drop some stock plugs in on Friday and see what if any improvements I can get. Going threw a tank and a half every week hurts the wallet. I know I get around 18 on the highway with this set up.
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Unread 07-23-2013, 11:53 AM   #45
tommudd
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Originally Posted by BIG_J View Post
Well I'm driving 26.3 miles each way to work and home. I tried the e3 plugs. My mileage is 14.3 and I sit in my Jeep with the ac running on lunch. I also have 245/75/16 dura tracks, and 4.5 inches of lift on an 05. I'm going to drop some stock plugs in on Friday and see what if any improvements I can get. Going threw a tank and a half every week hurts the wallet. I know I get around 18 on the highway with this set up.
getting rid of those junk plugs will make a difference for sure!
Then idleling at lunch knocks it down 2-3 MPG, Tires somewhat as well due to the engine not turning at a good rpm
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