A clap-out for clapped-out jalopies

Autoblog is reporting that

. . . a new oil additive with the unfortunate name of "Clap" could improve the fuel consumption of old car engines by as much as 10 percent.

Clap (stop snickering!) was originally developed in Russia, as a nanoscale powder intended as a lubricant additive. The nanoparticles fill in cracks and abrasions in cylinder walls and pistons, improving combustion and thus fuel efficiency. The problem was finding a powder material that would do the job without compromising the lubricating properties of the oil.