Ah, but everyone else would be using combined, as well. So you'd be in about the same place.

I like using the HWY number because it's the highest published number... and anybody can exceed it by 10-20% in any vehicle in ANY driving environment if they try.

It's easy to NOT get good gas mileage. I drove to Starke last weekend and was in more of a hurry than I usually let myself be in, so I just drove "fast". Accelerated briskly, drove 10-15 mph over the limit everywhere, and when I got there, I had just under 32 mpg. That might sound good, but my car is rated at 36 mph highway and I almost always exceed it!