U.S. auto sales this May are expected to be flat if we compare them with 2016 auto sales for the same month, but considering all the signs of stagnation isn’t that a good thing? Automakers in the U.S. market will report May sales on Thursday, June 1. The long Memorial Day weekend and sales promotions traditionally give May sales a boost. U.S. auto sales were down a disappointing 4.7 percent in April, compared with April 2016. Year to date, auto sales were down 2.4 percent after four months. It’s well documented by now that the slowdown in sales is hitting passenger cars, while trucks are more popular than ever. Trucks include pickups, SUVs, minivans and so-called crossovers. Year to date after four months,passenger car sales were down 11.4 percent, while trucks were up 4.3 percent.