Well I never knew how much "adjusting the nut behind the wheel" could impact your gas mileage but if you look at my gas log from before I knew about hypermileing techniques I was no sloucher but when I first started I never thought I would hit 30+mpg.
Maybe 26 with driving technique and 28 with aero mods and striped down but not 30 mpg with just changing driving habits.
Too bad it doesn't look like she will last long enough to meet her other goals.
After hitting a tank 58% over EPA mixed driving estimates to think if everyone just hit 15% - 20% over how much more gas and less polution there would be.
I exceed 30 average any time the highway percent goes above 60% in my Delta 88. I think Big Red can do it too. Too bad it sounds like you don't do mechanic well. There aren't very many sensors on that engine and there's only a few specific things that cause no start.
Big Red looks a lot like my Eagle Vision. Good job at 30 mpg. I could never get more than 22 or 23 in my car. Funny though, I had the same problem with the heat going full blast no matter what you do in my car also. Had to get a new climate control thingy.