EXHIBIT 99.1

O'Reilly Automotive, Inc. Reports Third Quarter 2010 Results

• Comparable Store Sales increase of 11.1%
• Adjusted operating margin improves to 14.4%
• Adjusted diluted earnings per share increases 37% to $0.86

SPRINGFIELD, Mo., Oct. 27, 2010 (GLOBE NEWSWIRE) -- O'Reilly Automotive, Inc. ("O'Reilly" or "the Company") (Nasdaq:ORLY), a leading retailer in the automotive aftermarket industry, today announced record revenues and earnings for the third quarter ended September 30, 2010.

3^rd Quarter Financial Results

Sales for the third quarter ended September 30, 2010, totaled $1.43 billion, up 13% from $1.26 billion for the same period a year ago. Gross profit for the third quarter ended September 30, 2010, increased to $693 million (or 48.6% of sales) from $611 million (or 48.5% of sales) for the third quarter of 2009, representing an increase of 14%. Selling, General and Administrative ("SG&A") expenses increased to $488 million (or 34.3% of sales) for the third quarter of 2010 from $461 million (or 36.7% of sales) for the third quarter of 2009, representing an increase of 6%. Operating income increased to $199 million (or 14.0% of sales) for the third quarter of 2010 from $149 million (or 11.9% of sales) for the third quarter of 2009, representing an increase of 33%.

Net income for the third quarter ended September 30, 2010, totaled $117 million, up 34% from $87 million for the third quarter of 2009. Diluted earnings per common share for the third quarter of 2010 increased 30% to $0.82 on 142 million shares compared to $0.63 for the third quarter of 2009 on 139 million shares.

The Company's third quarter and year-to-date results include charges related to the legacy United States Department of Justice ("DOJ") investigation of CSK Auto Corporation ("CSK"). As previously announced, prior to O'Reilly's acquisition of CSK in July of 2008, the DOJ began an investigation of CSK relating to CSK's historical accounting practices. O'Reilly and the DOJ have now agreed in principle, subject to final documentation, to resolve the DOJ investigation of CSK's legacy accounting practices. Based upon the agreement in principle for a final settlement, the Company has recorded an additional charge of $5.9 million in the third quarter of 2010 to increase its accrual in anticipation of the DOJ, CSK and O'Reilly executing a Non-Prosecution Agreement and the Company paying a one-time monetary penalty of $20.9 million to the DOJ. 

Adjusted operating income, excluding the impact of the charge related to the CSK DOJ investigation discussed above, increased 37% to $205 million (or 14.4% of sales) for the third quarter ended September 30, 2010, from $149 million (or 11.9% of sales) for the third quarter of 2009. Adjusted diluted earnings per common share, excluding the impact of the charge related to the CSK DOJ investigation discussed above, increased 37% to $0.86 for the third quarter ended September 30, 2010, from $0.63 for the third quarter of 2009. The table below outlines the impact of the charge for the third quarter ended September 30, 2010 (in thousands, except per share data): 

Commenting on the quarterly results, Greg Henslee, O'Reilly's Co-President and CEO stated, "We are extremely pleased to announce an exceptionally strong comparable store sales increase of 11.1% for the third quarter, which exceeded our expectations. Sales for the quarter were positively influenced by warmer weather conditions across most of our markets as well as the ongoing strong demand for our products. The macro environment remains favorable for our business and our Team Members continue to consistently provide unparalleled levels of customer service. We were able to leverage our strong top-line performance with a continued commitment to the execution of our CSK integration plan and a relentless attention to expense control to deliver a 250 basis point improvement in adjusted operating margin resulting in our 7^th consecutive quarter of double-digit earnings per share growth."   

Ted Wise, O'Reilly's Co-President and COO stated, "In the third quarter, we began the relocation of our Dixon, California, distribution center [DC] to a new, larger facility in Stockton, California, and subsequent to the end of the quarter, we successfully completed the conversion of stores serviced by the new DC. In addition, we opened 48 new stores during the quarter, putting us on track to open our projected 150 new stores in 2010. For 2011, our projection is to open approximately 170 new stores. Our strong performance during the quarter was again the result of the hard work and dedication of our Team Members, and we wanted to take this opportunity to thank each of them for their contribution to O'Reilly's continued success."

Year-to-Date Financial Results

Sales for the first nine months of 2010 totaled $4.09 billion, up 11% from $3.67 billion for the same period a year ago. Gross profit for the first nine months of 2010 increased to $1.98 billion (or 48.6% of sales) from $1.76 billion (or 47.8% of sales) for the same period a year ago, representing an increase of 13%. SG&A expenses increased to $1.41 billion (or 34.6% of sales) for the first nine months of 2010 from $1.34 billion (or 36.6% of sales) for the same period a year ago, representing an increase of 5%. Operating income for the first nine months of 2010 increased to $549 million (or 13.4% of sales) from $412 million (or 11.2% of sales) for the same period a year ago, representing an increase of 33%. 

Net income for the first nine months of 2010 totaled $314 million, up 33% from $236 million for the same period a year ago. Diluted earnings per common share for the first nine months of 2010 increased 30% to $2.23 on 141 million shares compared to $1.71 for the same period a year ago on 137 million shares.

Adjusted operating income, excluding the impact of the charges related to the CSK DOJ investigation discussed above, increased 38% to $570 million (or 13.9% of sales) for the first nine months of 2010, from $412 million (or 11.2% of sales) for the same period a year ago. Adjusted diluted earnings per common share, excluding the impact of the charges related to the CSK DOJ investigation discussed above, increased 39% to $2.37 for the first nine months of 2010, from $1.71 for the same period one year ago. The table below outlines the impact of the charges for the nine months ended September 30, 2010, (in thousands, except per share data):

Mr. Henslee added, "2010 is shaping up to be one of the strongest years in our history. Both the second and third quarters resulted in record adjusted operating margins, and we increased adjusted earnings per share 39% through the first nine months. Our strong results have been driven by the dedication and hard work of our Team Members and by our ability to provide a very high level of service and parts availability to both professional installer and retail customers. Our focus remains on our core Culture values of excellent customer service and professionalism as we complete the integration of the acquired CSK stores and continue to build on the solid foundations we have established in our western markets."

Mr. Wise added, "The planned conversion of our DC in Phoenix, Arizona, to the O'Reilly systems will occur on the 6^th of November along with the systems conversion of the surrounding 151 stores in that area, which will complete the computer system changeover process for all of the acquired CSK stores. With the support of the enhanced distribution model now in place in all of our western markets, we will continue to implement our proven dual market strategy in every market we serve, backed by the excellent customer service and teamwork of our 47,000 Team Members." 

3^rd Quarter and Year-to-Date Comparable Store Sales Results

Consolidated comparable store sales for stores open at least one year increased 11.1% for the third quarter of 2010 versus 5.3% for the third quarter of 2009. Consolidated comparable store sales for stores open at least one year increased 8.6% for the first nine months of 2010 versus 5.2% for the first nine months of 2009. Comparable store sales are calculated based on the change in sales for stores open at least one year and exclude sales of specialty machinery, sales to independent parts stores, sales to team members and sales during the one to two week period certain CSK branded stores were closed for conversion. 

4^th Quarter and Updated Full Year 2010 Guidance

The Company estimates diluted earnings per common share for the fourth quarter of 2010 to range from $0.56 to $0.60 and estimates diluted earnings per common share for the year ended December 31, 2010, to range from $2.79 to $2.83. Adjusted diluted earnings per common share, which excludes the impact of the charges related to the CSK DOJ investigation of $0.15 per diluted share, is expected to range from $2.94 to $2.98 for the year ended December 31, 2010.

The Company estimates consolidated comparable store sales for the fourth quarter of 2010 to range from 4.0% to 6.0%. The Company estimates consolidated comparable store sales for the year ended December 31, 2010, to range from 7.0% to 8.0%.

Non-GAAP Information

This release contains certain financial information not derived in accordance with United States generally accepted accounting principles ("GAAP"). The Company does not, and nor does it suggest investors should, consider such non-GAAP financial measures in isolation from, or as a substitute for, GAAP financial information. The Company believes that the presentation of financial results and estimates excluding the impact of the CSK DOJ investigation charges provides meaningful supplemental information to both management and investors that is indicative of the Company's core operations. The Company excludes these items in judging its performance and believes this non-GAAP information is useful to investors as well. The Company has included a reconciliation of this additional information to the most comparable GAAP measures in the accompanying reconciliation table.

Earnings Conference Call Information

The Company will host a conference call October 28, 2010, at 10:00 a.m. central time to discuss its results as well as future expectations. Investors may listen to the conference call live on the Company's web site, www.oreillyauto.com, by clicking on "Investor Relations" and then "News Room." We invite interested analysts to join our call. The dial-in number for the call is (706) 679-5789; the conference call ID number is 11646295. A replay of the call will also be available on the Company's website following the conference call.

About O'Reilly Automotive, Inc.

O'Reilly Automotive, Inc. is one of the largest specialty retailers of automotive aftermarket parts, tools, supplies, equipment and accessories in the United States, serving both the do-it-yourself and professional installer markets. Founded in 1957 by the O'Reilly family, the Company operated 3,536 stores in 38 states as of September 30, 2010.

The O'Reilly Automotive, Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=5430

Forward-Looking Statements

The Company claims the protection of the safe-harbor for forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. You can identify these statements by forward-looking words such as "expect," "believe," "anticipate," "should," "plan," "intend," "estimate," "project," "will" or similar words. In addition, statements contained within this press release that are not historical facts are forward-looking statements, such as statements discussing among other things, expected growth, store development, CSK DOJ investigation resolution, integration and expansion strategy, business strategies, future revenues and future performance. These forward-looking statements are based on estimates, projections, beliefs and assumptions and are not guarantees of future events and results. Such statements are subject to risks, uncertainties and assumptions, including, but not limited to, competition, product demand, the market for auto parts, the economy in general, inflation, consumer debt levels, governmental approvals, our ability to hire and retain qualified employees, risks associated with the integration of acquired businesses such as the integration of CSK Auto Corporation, weather, terrorist activities, war and the threat of war. Actual results may materially differ from anticipated results described or implied in these forward-looking statements. Please refer to the "Risk Factors" section of the annual report on Form 10-K for the year ended December 31, 2009, for additional factors that could materially affect our financial performance. 

Note: The balance sheet at December 31, 2009, has been derived from the audited Consolidated Financial Statements at that date, but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. Certain prior period amounts have been reclassified to conform to current period presentation. 

CONTACT:  O'Reilly Automotive, Inc.
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