If you switch to A Synthetic-Based Engine Oil, you cannot return to a Convetional Engine Oil.

Transmissions are the most complex component of any car

Volkswagen translated into English as "People's Car"

Fuel-Injection has been around since the 1920's, but was widely adopted in the late 1980's

That the Tucker Torpedo was the first car to introduce Seat Belts, Safety Glass, a Roll-Over cage and other safety equipment that is 'Standard' now-a-days