America's best-selling truck, the Ford F-Series, is losing market share, but this may just be temporary as it ramps up production to meet "sky-high" demand. Tesla may have the brightest future among any automaker in theory, but how long will it take for its plans to be realized? According to Autodata, US auto sales SAAR for the month of May beat economists' expectations by a significant margin, with an actual figure of 17.79 million compared to the projected 17.3 million.