Exhibit 5.3

[Letterhead of Lewis and Roca, LLP]

September 19, 2011

O’Reilly Automotive, Inc.

233 South Patterson

Springfield, Missouri 65802

Registration Statement on Form S-3

Ladies and Gentlemen:

We have acted as special Arizona counsel to CSK Auto, Inc., an Arizona corporation (the “Arizona Guarantor”), in connection with the public offering of $300,000,000 aggregate principal amount of the Company’s 4.625% Senior Notes due 2021 (the “Notes”), including the guarantees thereof (the “Guarantees” and, together with the Notes, the “Securities”) by subsidiaries of the Company, including a guaranty of the Notes by the Arizona Guarantor (all such subsidiaries of the Company that are issuing Guarantees, collectively, the “Guarantors”), issuable pursuant to an indenture, dated as of September 19, 2011 (the “Indenture”), among the Company, the Guarantors and UMB Bank, N.A., as trustee. The Company and the Guarantors entered into an underwriting agreement, dated as of September 14, 2011 (the “Underwriting Agreement”), with Merrill Lynch, Pierce, Fenner & Smith Incorporated and J.P. Morgan Securities LLC, as representatives of the several Underwriters named therein (the “Underwriters”), relating to the sale by the Company to the Underwriters of the Securities.

This opinion is being furnished in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Securities Act of 1933 (the “Securities Act”).

In connection with this opinion we have examined originals or copies, certified or otherwise identified to our satisfaction, of:

We have also examined:

We have also examined originals or copies, certified or otherwise identified to our satisfaction, of such records of the Company and the Guarantors and such agreements, certificates and receipts of public officials, certificates of officers or other representatives of the Company, the Guarantors and others, and such other documents as we have deemed necessary or appropriate as a basis for the opinion set forth below.

In our examination, we have assumed the legal capacity of all natural persons, the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as facsimile, electronic, certified or photostatic copies, and the authenticity of the originals of such copies. In making our examination of executed documents, we have assumed that the parties thereto, including the Company and the Guarantors (other than the Arizona Guarantor), had the power, corporate or other, to enter into and perform all obligations thereunder and, except as expressly set forth in our opinion below, have also assumed the due authorization by all requisite action, corporate or other, and the execution and delivery by such parties of such documents and the validity and binding effect thereof on such parties. We have also assumed that the Company and the Guarantors (other than the Arizona Guarantor) have been duly organized and are and will continue to be validly existing in good standing, and have and will continue to have the requisite legal status and legal capacity, under the laws of their respective jurisdictions of organization and that the Company and the Guarantors (other than the Arizona Guarantor) have complied and will comply with all aspects of the laws of all relevant jurisdictions (including the laws of their respective jurisdictions of organization) in connection with the transactions contemplated by the Indenture and the Registration Statement. As to any facts material to the opinion expressed herein that we did not independently establish or verify, we have relied upon statements and representations of officers and other representatives of the Company, the Guarantors and others and of public officials.

The opinion set forth below are subject to the following further qualifications, assumptions and limitations:

Our opinion set forth herein are limited to (i) the Business Corporation Act of the State of Arizona, and (ii) those laws of the State of Arizona that, in our experience, are normally applicable to transactions of the type contemplated by the Registration Statement and, to the extent that judicial or regulatory orders or decrees or consents, approvals, licenses, authorizations, validations, filings, recordings or registrations with governmental authorities are relevant, to those required under such laws (all of the foregoing being referred to as “Opined on Law”). We do not express any opinion with respect to the law of any jurisdiction other than Opined on Law or as to the effect of any such law (other than Opined on Law) on the opinion herein stated, which laws are subject to change with possible retroactive effect. Insofar as the opinion expressed herein relate to matters governed by laws other than Opined on Law, we have assumed, without having made any independent investigation, that such laws do not affect the opinion set forth herein.

Based on the foregoing and relying thereon, and subject to the assumptions, exceptions and qualifications set forth herein, it is our opinion that the issuance and sale of the Arizona Guaranty by the Arizona Guarantor has been duly authorized by the Arizona Guarantor.

We hereby consent to the filing of this opinion with the Commission as an exhibit to the Company’s Current Report on Form 8-K being filed on the date hereof and incorporated by reference into the Registration Statement. We also hereby consent to the reference to our firm under the caption “Legal Matters” in the Registration Statement. In giving this consent, we do not thereby admit that we are included in the category of persons whose consent is required under Section 7

of the Securities Act or the rules and regulations of the Commission promulgated thereunder. This opinion is expressed as of the date hereof unless otherwise expressly stated, and we disclaim any undertaking to advise you of any subsequent changes in the facts stated or assumed herein or of any subsequent changes in applicable law. Subject to all qualifications, limitations, exceptions, restrictions and assumptions set forth herein, Skadden, Arps, Slate, Meagher & Flom LLP may rely on this opinion letter as if it were an addressee hereof on this date for the sole purpose of rendering its opinion letter to the Company relating to the Securities, as filed with the Commission as Exhibit 5.1 to the Company’s Current Report on Form 8-K, being filed on the date hereof.