They are testing them out:
UPS has more than 70,000 vehicles on the road, so gains in fuel efficiency can save the company a lot of money—and reduce carbon emissions for the rest of us. Their latest experiment is a prototype CV-23 truck, which has body panels made of ABS plastic instead of sheet aluminum. That means it’s about 1,000 lbs lighter than a standard truck and can run on a smaller engine. The upshot? It’s 40 percent more fuel efficient. The folks at Triple Pundit estimate it gets more than 14 miles per gallon, which might not sound like a lot, but could save around 84 million gallons of fuel annually.
UPS will be testing five of these plastic CV-23s, made by Utilimaster and Isuzu, through December 2011, on some of the company’s most bruising, high-mile routes. They’ll deal with rough rural roads in Lincoln, Nebraska; freezing temperatures in Albany, New York; and the heat of the Tucson, Arizona desert. If they survive, they’ll be incorporated into UPS’s permanent fleet.
And good news: ABS plastic can, in theory at least, be recovered and reused when the trucks have been retired.
You just hope the trucks don’t melt in Arizona. It will be interesting to see how they react to different types of weather.