NORMAN, Okla. (AP) — The Plymouth Belvedere buried in a time capsule was rusty and undriveable, but gasoline cached with the car could have scientific value.

The people who put together the time capsule 50 years ago in Tulsa included two containers of gasoline in case fuel was no longer available for the 1957 Plymouth when the vault was unsealed.

For Paul Philp, a professor of petroleum and environmental geochemistry at the University of Oklahoma, the gas is valuable on its own.

"We're going to begin fingerprinting the gasoline and compare it to modern day gasolines," he said.

Philp hopes researchers will be able to use the comparison of old and new gas as a reference to determine the age of gasoline spills that have leaked into the ground.