The idea of an "Italian tune-up" has been around for ages at this point, but does it actually work? Is revving your engine to redline every once in a while actually good for it, does the harm outweigh ...

At Nissan’s powertrain plant in Decherd, Tennessee, a 3.8-liter V6 sits bolted to a dynamometer, screaming at redline while its exhaust components glow orange from sustained heat. The engine has been ...