94 vs 95: Which one? Why?

[BradE.]

My 1997 4.0 OHV gets 16-18 city and 20-22 highway.

Just did a plug change a few months ago, so that helped.

 

[Gimp]

The best highway mileage I've gotten is 25. That's not a lot better than my city mileage but when you're trying to push a brick through the air...

 

[Rhett]

Pretty good numbers for a brick...

I am going to switch over to synth in the diffs soon.
Currently I only run synth oil. Still, with 3.27s I would think I could do a little better. The Apten chip has given me about 1 extra mpg.