I regularly get around 17-19 with mixed driving. So far, all I have is new tires (AT's) and the poorest of the PMLs (shackles and torsion bump). I cruise 75. I don't wear a hole in the gas pedal when I am driving around town and I noticed that helps tremendously. The new ethanol gas is showing up more and I am getting better now than with the MTBE crap that was around. I'm sure that this time next year, I'll be saying something different. I use good quality gas whenever possible and I made it to 310 once before I pulled in for a fill up. I was sweatin bullets but it made it that far. All I can say is stay on top of maintenance, use the cruise control on the freeways, and don't gag it around town.

I will now stop beating on Trigger