Two of the three operating segments within AutoNation's retail new-vehicle unit sales metric registered increases in August.

The dealer group reported the sales breakdown went as follows:

— 10,239 units for domestic, up 2 percent versus August of last year

— 14,641 for import, down 14 percent versus August of last year

— 6,152 for premium luxury, up 8 percent versus August of last year.

All told, AutoNation turned 31,032 new vehicles in August, a decrease of 5 percent as compared to the same month last year, which included a calendar quirk where Labor Day sales were included in the August results.

On a same-store basis, AutoNation reported retail new vehicle unit sales in August softened by 7 percent year-over-year.

AutoNation expects to announce September retail new-vehicle unit sales on Oct. 2.