CHICAGO (Standard&Poor's) July 30, 2008--Standard&Poor's Ratings Services said today it assigned its preliminary 'BBB' and 'BBB-' ratings to AutoZone Inc.'s senior debt and subordinated debt securities, respectively, filed under Rule 415. The company immediately drew down $750 million of notes from this shelf, including $500 million 6.5% senior unsecured notes due 2014 and $250 million 7.125% senior unsecured notes due 2018. Both issues are rated 'BBB'. The company's 'BBB' corporate credit rating remains unchanged. Memphis, Tenn.-based AutoZone will use proceeds from the note issuances for share repurchase and debt refinancing. This is consistent with AutoZone's June 2008 announcement that it will expand its share repurchase program and increase leverage to at least 2.5x (adjusted debt/EBITDAR calculated