It has been just over a decade since GM V8 engine technology like cylinder deactivation and light-weight oils became standard, how have they impacted sales? This question was raised by a recent ...

General Motors has filed a new patent that offers a look at how the company may be rethinking cylinder deactivation for its next generation of pushrod engines. The application, published by the U.S.

GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for engine cylinder deactivation. The patent application is tagged with patent ...

Today we have the incredible luck of choosing exactly the kind of car and powertrain we want. The auto industry was never this diverse in its offerings. This might mean that we should better inform ...