For real according to David Hutchison, a Cryogenics expert, who cryogenically tempers all kinds of metals. A few years ago he began freezing engine components on his hybrid Honda. The results were a fuel-efficiency dream.

A few years ago he began an experiment on his hybrid Honda, freezing the engine components. The results were a fuel-efficiency dream.

David Hutchison says, “You should expect a “Cryo'd” engine to last anywhere from 600,000 to 1 million miles without wearing out.”

Apparently NASCAR thinks there is merit to it.

Racers have picked up on David's trick of cryogenically freezing car parts. It is now widely accepted among NASCAR and Indy-car racers...

Hutchison tells us cryogenically tempering car parts has more benefits than just fuel efficiency. He freezes all of the brake rotors at a car dealership near his home in Missouri. It makes them last three to five times longer.

Watch the KFOR-TV video about David Hutchison's cryogenics experiment here.