 Advance Auto Parts Inc. AAP, 0.29 stock fell more than 6 in the extended session Tuesday after the auto-parts retailer reported mixed second-quarter results and lowered its outlook for the year. Advance Auto Parts said it earned 144 million, or 2.39 a share, in the quarter, compared with earnings of 177 million, or 2.76 a share, in the year-ago period. 