WOODCLIFF LAKE, N.J. -

All-time record certified pre-owned sales were reached for six import brands last month, according to Autodata Corp., which also highlighted nice gains overall for European- and Asian-brand programs in May.

In its latest recap of CPO sales, Autodata said these import brands had best-ever CPO results:  Infiniti, Lexus, Mini, Nissan, Porsche and Subaru.

Plus, Autodata said, Volvo sales were at a recent high.

Overall, Asian-brand dealers sold 107,870 CPO units for the month (up 8.3 percent), with year-to-date sales hitting 482,578. That beats the year-ago pace by 6.7 percent.

European brands reported 43,286 certified sales in May, beating May 2014 figures by 11.9 percent. Five-month figures stood at 185,813 units, an 11.6-percent increase.