Every ounce of weight that can be removed from a vehicle helps it use less fuel and perform better. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the use of magnesium in Porsche's new 911 GT3 RS. SAE Eye on Engineering can be viewed at http://youtu.be/WTCWMvw936Y. It also airs in audio-only form Monday mornings on WJR 760 AM Detroit's Paul W. Smith Show. Access archived episodes of SAE Eye on Engineering at www.sae.org/magazines/podcasts.