Navistar has unveiled the International TerraStar Class 4/5 commercial truck touting a wide range of commercial-duty features, from its commercial-duty MaxxForce 7 V-8 diesel engine to the largest, roomiest cab available.  The International TerraStar sets a new standard in the 4/5 class truck market. GM and Ford announce the most environmentally friendly and powerful Heavy Duty pickup diesel engines ever produced, in the 2011 6.6 Duramax and the 6.7 Powerstroke “Scorpion” respectively. The new Duramax boasts 397 horsepower and 765 pound-feet of  torque with an 11% increase in fuel economy.  The new Ford 6.7L Powerstroke “Scorpion” will produce 385 hosrepower and 735 pound-feet of torque, but so far Ford hasn’t released much more info on the upcoming motor other than it’s lighter, more powerful, more reliable and the only thing being transferred from the outgoing diesel is the Powerstroke namesake.  Meanwhile Hyundai introduces an advanced auto-diesel powertrain in its new iX35 compact SUV to directly compete with BMW’s new X1.