Dateline NBC
updated 4/2/2009 11:53:40 AM ET 2009-04-02T15:53:40

  • See the official HFAC test results
  • Recent court decision in case of FTC and Dennis Lee
  • Receipt for installation, purchase of HFAC device
  • Customer instruction sheet that comes with device
  • Press release from mechanic Sam Burlum
  • Go to Eric Krieg's Web site
  • EPA's tests on gas-saving devices
  • Read a statement from the EPA to Dateline
  • Popular Mechanics: Why water won't improve MPG
  • fueleconomy.gov
  • Watch web-exclusive clips from this story
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