Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Family 0 is a family of inline piston engines that was developed by GM Powertrain, a subsidiary of Opel, as a low-displacement engine for use on entry-level subcompact cars from Opel/Vauxhall. The engine was first introduced in 1996 Opel Corsa as a 3-cylinder version. It features light cast-iron engine block, aluminum cylinder head with Hollowcast camshafts and DOHC valvetrains driven by chain. Modern versions use variable intake technology.