This week, MyAutocar's readers have been finding out about Autocar's agony uncle Colin Goodwin latest mission. Given the latest super-frugal Bluetec diesel Mercedes E-class, we challenged him to drive from one side of America to the other using only £100 of fuel.Speeding fines, severe weather and a lack of diesel pumps were some of the tribulations encountered on the journey, so click here to find out if Colin's high-tech E-class made it to Los Angeles before the money ran out.The Vauxhall VXR8 has been given the Autocar treatment this week, as Peter Robinson gets the first go in Holden's answer to the M5.So can a £35,000 Aussie saloon car really stand up to the established forces of the BMW M5, and even the Mercedes E63 AMG? Our man certainly thinks so, but what's your opinion? Would you buy the VXR8? Find out all the details and join the debate by clicking here.Finally, the Silencer is questioning the edgy fight being played out between Lewis Hamilton and Fernando Alonso. Should those sideburns really be allowed under FIA rules? And was the Government telling the truth when it claimed that traffic congestion would simply cure itself? The Silencer isn't afraid to let you know, so click here to find out more and let us know what you think.