A Beverly Hills plastic surgeon who claims to have turned fat, extricated in liposuction, into biofuel for his car has skipped town after US officials raided his surgery in an investigation into his procedures.

Dr Craig Alan Bittner, who runs the Liposculpture clinic on Rodeo Drive, said that he had created "lipodiesel" with his patients' excess subcutaneous fat.

The cosmetic surgeon told Forbes.com that he used the blubber to power two cars including his four-wheel-drive Ford.

Dr Bittner is under investigation by the California Department of Public Health because it is illegal in the state to use human medical waste to power vehicles.

He reportedly wrote about the practice on his website, lipodiesel.com, which has since been shut down. "The vast majority of my patients request that I use their fat for fuel - and I have more fat than I can use," he wrote.

"Not only do they get to lose their love handles or chubby belly but they get to take part in saving the earth."

But a spate of recent lawsuits filed against the surgeon by patients who claim he let his unqualified girlfriend and assistant carry out surgical procedures that allegedly left them disfigured uncovered the doctor's fat-fueled activities. According to his website Dr Bittner is currently volunteering "in a rural clinic outside Bogota, Colombia".

The patients claim that they found Dr Bittner via the internet and arranged pre-operative consultations at his office, but instead of Dr Bittner conducting the consultation, it was his office manager Darcy, according the the Beverly Hills Courier.

In addition, WIRED magazine cast doubt on Dr Bittner's claim that he used the lipodiesel to power his girlfriend's Lincoln Navigator - which it said does not have a diesel model.

It said the whole scheme could be a hoax inspired by the film Fight Club, in which Brad Pitt's character Tyler Durden uses waste from liposuction to make soap.

Dr Bittner left a message on his clinic's website on November 20 to tell clients he was moving to South America to volunteer at a small clinic "where I can help those most in need."