It's just not very common that you see a diesel Jeep is what I'm getting at it and that it would be pretty neat to have one, even if it was just as a project vehicle. Maybe make it your trail Jeep or something, I certainly wouldn't use a diesel as a DD in this economy. I just watched your video Gavan and my god that is an awesome Jeep. That thing sounds awesome too. Did you do all that work yourself?
I made that Jeep from a big pile of parts. I kind of like it myself ;D
I get mid-high teens if there is a lot of towing and hauling and city driving, to mid-low 20s if it is mostly empty and highway driving. For a big heavy pig on 1 tons and heavy 37s, that is pretty phenomenal. I would expect single digits with a health gas motor.
You do a diesel Jeep because you want one. There is no way you can ever justify the fuel savings, there is a lot of work involved, and it takes some dedication and tinkering long after the swap to get everything "right", especially on smaller diesels that there is not as big of a knowledge base on. There is a fair amount of information about the Cummins 4BT, and I am still chasing down all the problems associated with it.
That being said it is still pretty awesome.
A lot of people say diesels have no place in Jeeps, especially 4BTs because they are "big, heavy, loud and vibrate a lot", but they usually do not own one or have been around one that has not been well thought out. Mine is not quiet, but there is no soundproofing, and it is absolutely tolerable - the wind and tire noise over 70 is usually more then the motor, and it runs very smooth on hydro mounts.