SPRINGFIELD, Mo. — O'Reilly Automotive announced record revenues and earnings for the second quarter ended June 30, 2010.

Highlights include:

• Consolidated comparable store sales increase of 7.9 percent
• Adjusted operating margin improves to 14.2 percent
• Adjusted diluted earnings per share increases 31 percent to 81 cents
            
Sales for the second quarter ended June 30, 2010, totaled $1.38 billion, up 10 percent from $1.25 billion for the same period a year ago. Gross profit for the second quarter ended June 30, 2010, increased to $673 million (or 48.7 percent of sales) from $604 million (or 48.2 percent of sales) for the second quarter of 2009, representing an increase of 11 percent.

Selling, General and Administrative ("SG&A") expenses increased to $476 million (or 34.5 percent of sales) for the second quarter of 2010 from $454 million (or 36.3 percent of sales) for the second quarter of 2009, representing an increase of 5 percent. Operating income increased to $181 million (or 13.1 percent of sales) for the second quarter of 2010 from $150 million (or 12 percent of sales), representing an increase of 21 percent.

Net income for the second quarter ended June 30, 2010, totaled $100 million, up 16 percent from $86 million for the same period in 2009. Diluted earnings per common share for the second quarter of 2010 increased 15 percent to 71 cents on 141.1 million shares compared to 62 cents for the second quarter of 2009 on 137.5 million shares.