Zx400

If you’re an ecologically sensitive Gen Y-er who wants to stick it to the man and buck conventional wisdom, a 1980-82 VW 







  Caddy with a 1.5-liter or 1.6-liter diesel may be the truck for you. Price and quality will vary greatlydepending on the condition of this compact, two-door oil-burner, but it will run on biodiesel or waste vegetable oil from the Chinese restaurant around the corner (properly filtered, of course) and return fuel economy better than 40 mpg.