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.

GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for ...

Here is a practical and relatable breakdown of the top car problems mechanics hope you never learn to fix. Knowing what to ...

Quick-lube oil changes use $3 filters without anti-drainback valves, causing dry starts that grind metal and destroy engines ...