I was planning on selling my old gas hog and getting a new Fiesta or Elantra, but when I ran the numbers, even at 4.50/gallon, it was cheaper to feed the gashog than to eat the depreciation, etc., on a new one.
So I'm modding my old car for practice, and when I get it figured out, I'll mod the gas hog and see if I can bump it up 20-30%. (I'm really hoping for 55%-30mpg, but I try not to set myself up for failure if it's not necessary.
)
Crude little total-cost-of-ownership spreadsheet attached.