I'd be very happy with 17.1. My "baseline" numbers are going to and coming back from Moab, where I'm typically in the 13.4 range. I haven't really driven the 80 much (and try not to) since the MAF mod, so my next real test will be going out to Rubithon.
In fact I'm kind of looking forward to seeing how 10 of our trucks all compare, tank after tank, seeing how the S/C guys do compared to the non-S/C guys, the MAF mods vs. the non-MAF, etc. Maybe we should start a little pool.. whose 80 will get the best and worst MPG? [/hijack]