[Pillsbury Winthrop Shaw Pittman LLP letterhead]
March 3, 2017
6001 Bollinger Canyon Road
San Ramon, CA 94583
Gentlemen and Mesdames:
We are acting as
counsel for Chevron Corporation, a Delaware corporation (the Company), in connection with the issuance by the Company of $550,000,000 aggregate principal amount of the Companys 1.686% Notes Due 2019, $450,000,000 aggregate
principal amount of the Companys Floating Rate Notes Due 2019, $600,000,000 aggregate principal amount of the Companys 1.991% Notes Due 2020, $400,000,000 aggregate principal amount of the Companys Floating Rate Notes Due 2020,
$700,000,000 aggregate principal amount of the Companys 2.498% Notes Due 2022, $300,000,000 aggregate principal amount of the Companys Floating Rate Notes Due 2022 and $1,000,000,000 aggregate principal amount of the Companys
2.895% Notes Due 2024 (the Securities) pursuant to the Registration Statement on Form S-3 (Registration No. 333-206095) (the Registration
Statement) filed with the Securities and Exchange Commission (the Commission) under the Securities Act of 1933, as amended (the Act), on August 5, 2015, and the related base prospectus which forms a part of and is
included in the Registration Statement, as supplemented by the Prospectus Supplement dated February 28, 2017 filed with the Commission pursuant to Rule 424(b) under the Act (as so supplemented, the Prospectus). The Securities will
be issued under the Indenture, dated as of June 15, 1995, as supplemented by the Ninth Supplemental Indenture dated as of March 3, 2017 (as so supplemented, the Indenture), each being between the Company and Wells Fargo Bank,
National Association, as trustee (the Trustee).
We have reviewed and are familiar with such corporate proceedings and other
matters as we have deemed necessary for the opinions expressed in this letter. In such review, we have assumed that the Indenture has been duly authorized, executed and delivered by the Trustee, the Securities will be properly authenticated by the
manual signature of an authorized representative of the Trustee, and the signatures on all documents examined by us are genuine, which assumptions we have not independently verified.
On the basis of the assumptions and subject to the qualifications and limitations set forth herein, we are of the opinion that the Securities
have been duly authorized and, when issued and sold in accordance with the Indenture and as contemplated by the Registration Statement and the Prospectus, will constitute the valid and legally binding obligations of the Company, enforceable against
the Company in accordance with their terms, except as may be limited by applicable bankruptcy, insolvency, fraudulent conveyance, fraudulent transfer, receivership, conservatorship, arrangement, moratorium and other laws affecting and relating to
the rights of the creditors generally, by general equitable principles and by requirements of reasonableness, good faith, fair dealing and materiality.
The opinions set forth in this letter are limited to matters governed by the General Corporation Law of the State of Delaware and the laws of
the State of New York, in each case as in effect on the date hereof.
We hereby consent to the filing of this opinion letter as Exhibit
5.1 to the Companys Current Report on Form 8-K filed by the Company with the Commission on the date hereof and the incorporation thereof in the Registration Statement and to the use of our name under the
caption Legal Opinions in the Prospectus. In giving this consent, we do not thereby admit that we are within the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Commission
Very truly yours,
/s/ Pillsbury Winthrop Shaw Pittman LLP