Continued strong car sales were joined by a surge in truck and SUV demand to power a 12.6 percent growth in May U.S. sales for Ford Motor Company (NYSE: F), which cited demand for fuel-efficient vehicles as a primary driver of growth.

Car sales rose 6 percent for the Dearborn, Mich.-based automaker, while SUV sales grew 12 percent and truck sales soared 21 percent. Ford sold a total of 216,267 vehicles in May. Cars made up the biggest segment of Ford's sales, 36 percent, while trucks made up slightly less at 34 percent. The remainder of Ford's sales were SUVs.

Ford Motor Company (NYSE: F) shares fells 3.5 percent to $10.19 midday Friday.