skinny2 wrote:Or can you adjust this on the Pathfinder?
You can't. I've been all over the place with Nissan on this topic & the answer is a resounding "no."
We've had a few threads like this before, and it's always good to point out that most people are looking at their mpg from an uncorrected view, assuming they are getting better than they really are. I'm not sure about the other sized wheel options out there, but those with 16" wheels take note: the speedo/cpu(s) are calibrated for a 265/75/16 tire.
I'm running the 265/75/16s and over the 33,000 miles I've owned it, I've averaged 16.5mpg overall.