2.9L to 4.0L swap

[ronclark]

My 2.9L is giving me some problems, i am thinking of doing a swap to a 4.0L.
I found a 92 ex donor for $300. I am going to look at tomorrow.
My concern is my MPG, with the rise of fuel cost i still want to be about to afford to drive.
I been searching around it seems every gets between 15 to 17 avg.
Is it going to be worth the switch?

 

[jhammel85]

Fuel mileage will vary on the over condition of that motor IMO. I mean...Look at our 2.9's. They don't do much better but I get a little over what they say you will on fueleconomy.gov.

With a light foot (yes it's possible in a 4.0 as opposed to the powerhouse 2.9 ), good tire pressure, etc, you'll be alright.

 

[ronclark]

well as long is i dont get worse than my 2.9L. that little motor always seems to be good for what i needed. but you can do much with them and seems to be getting more expensive to rebuild.
i just notes i forgot to add 2.9L to 4.0L swap MPG