I have a ZJ 5.2 V8 with 105,000 miles and it gets 14 in the city and 17.5 on the highway, despite the lower reading that the trip computer gives me. That's about the best you can expect from a pushrod V8 moving that much weight. My brother in law has the I-6 and he gets as good as 21 on the hwy, and I think about 16 in the city, but it's a dog compared to my V8. The V8 in my 69 Mustang get even worse mileage then my Jeep, so I don't complain too much; I'm used to bad gas mileage.
One kudo for the I-6 however is that it is very easy to change the sparkplugs, wires, cap, and rotor. I changed those out on my V8, and it was difficult to get to everything.
1993 ZJ Limited 5.2 - no mods - Red with Gold (what were they thinking) trim.
Last edited by automan25; 01-03-2003 at 10:51 AM.