UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of the

Securities Exchange Act of 1934

For the month of October, 2023

Commission File Number 1-15106

PETRÓLEO BRASILEIRO S.A. – PETROBRAS

(Exact name of registrant as specified in its charter)

Brazilian Petroleum Corporation – PETROBRAS

(Translation of Registrant's name into English)

Avenida Henrique Valadares, 28 – 19th floor 
20231-030 – Rio de Janeiro, RJ
Federative Republic of Brazil

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. 

Form 20-F ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No___X____

Petrobras achieves high level of utilization of its refineries

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Rio de Janeiro, October 10, 2023 – Petróleo Brasileiro S.A. – Petrobras informs that in September its refining units reached 97% utilization for the second consecutive month. As a result, the Total Utilization Factor (FUT) of the refineries in 3Q23 reached 95.8%, the best result since 2014.

The largest refinery in the country, the Paulínia Refinery (Replan), broke its utilization record, processing an average of 427 mbpd (FUT of 98.4%) in September, totaling 12.8 million barrels of oil processed that month, the most since February 2015.

Also in 3Q23, Petrobras exceeded records in the production of oil products: S-10 diesel reached 464 mbpd compared to 419 mbpd produced in 2Q23, and gasoline reached 423 mbpd, the best result since 4Q13.

The expressive production figures for oil products in the third quarter of this year were achieved by taking into account the high operational reliability and availability of the company's refining units, combined with the efficiency of logistics and market service operations, and supported by robust technology and process digitalization solutions.

www.petrobras.com.br/ri

Para mais informações:

PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Relações com Investidores

e-mail: petroinvest@petrobras.com.br/acionistas@petrobras.com.br

Av. Henrique Valadares, 28 – 9 Andar – 20231-030 – Rio de Janeiro, RJ.

Tel.: 55 (21) 3224-1510/9947 | 0800-282-1540

Este documento pode conter previsões segundo o significado da Seção 27A da Lei de Valores Mobiliários de 1933, conforme alterada (Lei de Valores Mobiliários) e Seção 21E da lei de Negociação de Valores Mobiliários de 1934 conforme alterada (Lei de Negociação) que refletem apenas expectativas dos administradores da Companhia. Os termos: “antecipa”, “acredita”, “espera”, “prevê”, “pretende”, “planeja”, “projeta”, “objetiva”, “deverá”, bem como outros termos similares, visam a identificar tais previsões, as quais, evidentemente, envolvem riscos ou incertezas, previstos ou não, pela Companhia. Portanto, os resultados futuros das operações da Companhia podem diferir das atuais expectativas, e, o leitor não deve se basear exclusivamente nas informações aqui contidas.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: October 10, 2023

PETRÓLEO BRASILEIRO S.A–PETROBRAS

By: /s/ Sergio Caetano Leite

______________________________

Sergio Caetano Leite

Chief Financial Officer and Investor Relations Officer