buddy wants a ZJ, cant decide what engine - Page 4 - JeepForum.com

View Poll Results: What engine?
4.0L 18 22.22%
5.2L 63 77.78%
Voters: 81. You may not vote on this poll

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post #46 of 102 Old 06-10-2013, 07:42 PM
Scopez
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1994 ZJ 
 
Join Date: Oct 2011
Location: Aiken
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Quote:
Originally Posted by SLOspeed View Post
You guys do realize that the economy numbers on the overhead console are off by quite a bit? Mine is off by over 10%. The trip computer might read 22 average, but the actual average will be around 19.5.

Your math doesn't work... The tank is 25 gallons, so having a range of 300 miles means you're only getting 12mpg. If you're filling it before it's empty and only putting in 20 gallons, that's still only 15mpg. If you were actually getting 17mpg, your tank range would be 425 miles.
25gal tank huh? I'd love to see my 20gal tank turn into a 25gal... I push 340 to a tank doing 55-65 and occasional WOT to pass ******* drivers who do 15 under the speed limit.


94 ZJ Laredo. 5.2 Crate engine. 6in JKS SA Lift. 33in Destination MTs. ARB Front Bumper.
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post #47 of 102 Old 06-10-2013, 08:04 PM
SLOspeed
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1996 ZJ 
 
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I guess it's officially 23 gallons, not 25. I've definitely put more than 23 in mine on several occasions, though.
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post #48 of 102 Old 06-10-2013, 08:29 PM
kg6mov
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1996 ZJ 
 
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Last time I ran out of gas it took just over 23 gallons.

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1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
1998 ZJ 5.9 - Junked
1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

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I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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post #49 of 102 Old 06-10-2013, 09:16 PM Thread Starter
dnuccio
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1995 ZJ 
 
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Location: Phoenix
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ive never had the funds to fill it all the way so i dont know lol

Reliability is relative
R.I.P. Ratmonkey
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post #50 of 102 Old 06-10-2013, 09:41 PM
98ZJLTD
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1998 ZJ 
 
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Location: Denver
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My vote goes for the 5.2 cuz well its a V8 lo.l I love my 5.2 I average between 15-17 mpg (hand calculated) between city and highway driving around the Denver area. It does go down a little when I roll through the mountains because I have a heavy foot and don't like to go under the speed limit but the decrease in mpg is totally worth it to hear that throaty V8 (magnaflow high flow cat and a flowmaster super 44 sounds way rad btw) scream through the hills.

98 ZJ Limited- NP231 swap, IRO 4.5 inch Springs, Hydro Shocks, IRO adjustable double shear track bar, JKS quick discos 33x12.50 Kumho Road Venture MT on 15x8 D windows with 3.75 inch BS

My build thread- http://www.jeepforum.com/forum/f197/...hread-1557637/
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post #51 of 102 Old 06-10-2013, 09:53 PM
Scopez
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1994 ZJ 
 
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I've had no gas at all in my ZJ and it only took 20 gallons. Was there an option for a bigger tank?

94 ZJ Laredo. 5.2 Crate engine. 6in JKS SA Lift. 33in Destination MTs. ARB Front Bumper.
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post #52 of 102 Old 06-10-2013, 10:15 PM
SpenceAK
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1995 ZJ 
 
Join Date: Sep 2012
Location: Anchorage
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That's y I like zj's they come with a V8. I have a 95 4.0 and a niner like em both but the niner just a beast!
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post #53 of 102 Old 06-10-2013, 10:16 PM
WhiteOut
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1998 ZJ 
 
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Quote:
Originally Posted by Scopez View Post
I've had no gas at all in my ZJ and it only took 20 gallons. Was there an option for a bigger tank?
19 or a 23
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post #54 of 102 Old 06-11-2013, 07:58 AM
lawsonej
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1998 ZJ 
 
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Location: Batavia
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I am kinda of surprised of the complete negative reviews of the 4.0 in the ZJ platform on here especially since out of 1,428,095 production total of ZJ's that very small minority were 9'ers and a majority were 4.0's. Now i will agree that compared to an XJ that the 4.0 is sluggish in a ZJ. Will you get a lot more fun, towing and power out of either of the well established v8's? OF COURSE. The V8's rock and are awesome. But around here a majority of the people complain about mileage. Yes with tuning anything can be improved. But there is no promise of a new ZJ owner to knowing how to tune to best performance. If i was offered up a V8 ZJ, I would take it in a heartbeat. And like the one gent posted on here with the reliability of the 5.2 reach near 300,000 miles, it is possible to get alot engines to reach high mileage. Im sure if we had all the inline six guys posting their high mileage claims on hear, we would see alot of really impressive numbers. I own a 4.0, but love the 5.2 and 5.9. Ill take the ease of maintenance and upgrade as a beginner on the inline 6 anyday of a majority of the engines out there. But do i pull anything heavy with it? No. But with simple upgrades and maintence the mileage is very good for what it brings to the table off road. What little it may be worth, my very long 2 cents. I vote 4.0. Of course i would, i own one. Maybe im jealous lol
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post #55 of 102 Old 06-11-2013, 08:42 AM
9859limited
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1998 ZJ 
 
Join Date: May 2011
Location: Woburn
Posts: 209
V8 my niner is almost at 310k and I.drive it daily and average about 15mpg almost all city.
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post #56 of 102 Old 06-11-2013, 08:59 AM
JohnnyZJ
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both the 5.2 and 4L will outlast the crap trannies put behind them so 'reliability' is a moot point.

try and kill a 5.2. its a lot harder than you think, and they don't just 'die' unless a sensor goes; just like it could on a 4L.

long and short, both are good motors with crap trannies. one has more power. one is slightly better on fuel. however one you can actually put your foot into and feel it GO, the other struggles.

so ya. for the 10$ in fuel the 4L saves you, i'd go V8

07' JKUR rollin on 35s
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post #57 of 102 Old 06-11-2013, 01:25 PM
rebelbowtie
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Quote:
Originally Posted by JohnnyZJ View Post
both the 5.2 and 4L will outlast the crap trannies put behind them so 'reliability' is a moot point.

try and kill a 5.2. its a lot harder than you think, and they don't just 'die' unless a sensor goes; just like it could on a 4L.

long and short, both are good motors with crap trannies. one has more power. one is slightly better on fuel. however one you can actually put your foot into and feel it GO, the other struggles.

so ya. for the 10$ in fuel the 4L saves you, i'd go V8
Find one (4.0) with the AW4 then

He's an angel dressed in oilskins; he's a saint in the "Sou'wester,"
He's a pluck as they come, or ever can;
He's a hero born and bred, but it hasn't swelled his head,
For he's just the U.S. Government's hired man.
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post #58 of 102 Old 06-11-2013, 01:40 PM
970001zj
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Garage
lets put it this way

does your friend want to have his trans down shifting constantly or to be shifting his 5 speed at every hill

or have 300-ish v8 tq @ low rpm to pull you up said hill with ease

97 zj orvis/04 wj ltd
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post #59 of 102 Old 06-12-2013, 02:01 PM
moparlover1992
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1995 ZJ 
 
Join Date: Dec 2011
Location: Whittemore
Posts: 354
Quote:
Originally Posted by JohnnyZJ View Post
both the 5.2 and 4L will outlast the crap trannies put behind them so 'reliability' is a moot point.

try and kill a 5.2. its a lot harder than you think, and they don't just 'die' unless a sensor goes; just like it could on a 4L.

long and short, both are good motors with crap trannies. one has more power. one is slightly better on fuel. however one you can actually put your foot into and feel it GO, the other struggles.

so ya. for the 10$ in fuel the 4L saves you, i'd go V8
93-95 zjs have the 46rh which are extremely durable with good routine maintenance. And my at the time stock v8 got better mileage than a friend's stock 4.0 so I think it's a wash on the mileage and the reliability. V8 ftw

95 zj 5.2 np242 3.5'' IRO lift, IRO adjustable arms, KOR front trackbar, steering stabilizer and box brace, IRO rear adjustable trackbar, bilsteins, Hughes plenum plate, flow master 40, 31x10.5s on 15'' dc-2 rims
Mopar or no car!
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post #60 of 102 Old 06-12-2013, 02:20 PM
MyKeyB
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1997 ZJ 
 
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Location: Youngstown
Posts: 300
No replacement for displacement!

Rust never sleeps...
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