Dodge has not posted any numbers yet.With the nitro being smaller & lighter than a Dakota my guess is about 18 or 19 city & 22 or 23 hwy. but that is just a guess.
if you go on the dodge site and poke on a vehicle (i did the caliber) then look where it has mpg & horse power it shows all the dodge line
here is a link to it: http://www.dodge.com/en/performance/#mpg_caliber
3.7 liter auto and manual 18 & 23
4.0 liter auto and manual 17 & 21
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