HeyBub wrote:
Sodium Silicate.

The government mandates that cars traded in under the "Cash for
Clunkers" program be permanently disabled and specifies that the
method used is to replace the oil with Sodium Silicate then run the
engine until it freezes.
This has caught the suppliers of the substance by surprise. One
company that sold maybe 150 gallons of the stuff a year has already
sold 15,000 gallons!
From the Wall Street Journal:
http://online.wsj.com/article/SB124934376942503053.html

I'm not exactly what you would call a die hard "green" kind of a person, but
having learned the ways of thrift and economy from grandparents who survived
the great depression of 1929, I can't help but see this as a total waste of
otherwise useful resources.

Jon