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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > buddy wants a ZJ, cant decide what engine

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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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Unread 06-10-2013, 07:42 PM   #46
Scopez
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1994 ZJ 
 
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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.

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Unread 06-10-2013, 08:04 PM   #47
SLOspeed
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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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Unread 06-10-2013, 08:29 PM   #48
kg6mov
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Last time I ran out of gas it took just over 23 gallons.

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Unread 06-10-2013, 09:16 PM   #49
dnuccio
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ive never had the funds to fill it all the way so i dont know lol
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Unread 06-10-2013, 09:41 PM   #50
98ZJLTD
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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.
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Unread 06-10-2013, 09:53 PM   #51
Scopez
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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?
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Unread 06-10-2013, 10:15 PM   #52
SpenceAK
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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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Unread 06-10-2013, 10:16 PM   #53
WhiteOut
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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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Unread 06-11-2013, 07:58 AM   #54
lawsonej
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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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Unread 06-11-2013, 08:42 AM   #55
9859limited
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V8 my niner is almost at 310k and I.drive it daily and average about 15mpg almost all city.
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Unread 06-11-2013, 08:59 AM   #56
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
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Unread 06-11-2013, 01:25 PM   #57
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
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Unread 06-11-2013, 01:40 PM   #58
970001zj
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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
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Unread 06-12-2013, 02:01 PM   #59
moparlover1992
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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
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
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Unread 06-12-2013, 02:20 PM   #60
MyKeyB
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No replacement for displacement!
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