Group 1 Automotive increased its U.S. used-vehicle sales by more than 6 percent in the first quarter, retailing close to 27,000 units.

Specifically, it sold  26,831 used retail units, up 6.7 percent year-over-year.

Used retail revenue in the U.S. was up 9.1 percent at $558.76 million.

Gross margin percentage on used retail sales was 7.8 percent, compared to 7.9 percent in Q1 of 2015.

Used retail gross profit was up 7.2 percent at $43.46 million.

Gross profit per used unit retailed was $1,620, up 0.4 percent year-over-year.

When including international results, Group 1 retailed 32,791 used vehicles in Q1, a 9.4-percent increase.