I think it's useful to consider non-hybrid options on two grounds: mileage and green house gas emissions plus our dependence on the Middle East. I own a 2002 VW TDI, 120k miles, run 100% biodisel in it and get 36mpg this being an auto transmission. would be 40 with a manual transmission. GHG emission reduction 75% from any other fuel/engine combination. The fuel is more expensive unless you make your own and I don't thus far. No Exon/Mobil, however. This solution is both cheaper than a hybrid in upfront cost and, I'd suggest, is environmentally superior.