The overall ratings of 25 Oil Gas & Consumable Fuels stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

CNOOC Limited Sponsored ADR (CEO) experiences a ratings drop this week, going from last week’s C to a D. CNOOC Limited Sponsored ADR is an oil and gas company engaged in the exploration, development, and production of crude oil and natural gas. The company also gets F’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of CEO stock.

This week, Concho Resources Inc.’s (CXO) rating worsens to a D from the company’s C rating a week ago. Concho Resources Inc. engages in the acquisition, exploration, and development of oil and natural gas properties in the United States. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of CXO stock.

This week, Chevron Corporation (CVX) drops from a C to a D rating. Chevron Corporation is an integrated energy company with operations in countries located around the world. The company also gets F’s in sales growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of CVX stock.

Noble Energy, Inc. (NBL) earns a F this week, moving down from last week’s grade of D. Noble Energy, Inc. is an independent company engaged in the acquisition, exploration, development, production and marketing of crude oil, natural gas, and natural gas liquids. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of NBL stock.

This is a rough week for Targa Resources Corp. (TRGP). The company’s rating falls to F from the previous week’s D. Targa Resources Corp. provides midstream natural gas and natural gas liquid (NGL) services in the United States. The company also gets F’s in sales growth, earnings revisions, and free cash flow. For more information, get Portfolio Grader’s complete analysis of TRGP stock.

Suncor Energy Inc. (SU) is having a tough week. The company’s rating falls from a C to a D. Suncor Energy Inc. is an integrated energy company in Canada. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of SU stock.

Pembina Pipeline Corporation (PBA) slips from a C to a D this week. Pembina Pipeline Corporation transports, stores, and markets petroleum products. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of PBA stock.

Canadian Natural Resources Limited (CNQ) declines this week from a C to a D. Canadian Natural Resources Limited is an independent energy company that acquires, explores, develops, produces, markets, and sells crude oil, NGLs, and natural gas production. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of CNQ stock.

Slipping from a C to a D rating, DCP Midstream Partners, LP (DPM) takes a hit this week. DCP Midstream Partners, LP engages in gathering, compressing, treating, processing, transporting, storing, and selling natural gas in the United States. The company also gets F’s in sales growth, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of DPM stock.

Matador Resources Company (MTDR) gets weaker ratings this week as last week’s C drops to a D. Matador Resources Company engages in the exploration, development, production, and acquisition of oil and natural gas resources in the United States. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of MTDR stock.

Par Pacific Holdings Inc’s (PARR) rating weakens this week, dropping to a D versus last week’s C. The company also gets F’s in sales growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of PARR stock.

Green Plains Inc. (GPRE) experiences a ratings drop this week, going from last week’s D to a F. Green Plains Inc. constructs and operates dry mill, fuel-grade ethanol production facilities. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of GPRE stock.

Golar LNG Partners LP (GMLP) declines this week from a C to a D. Golar LNG Partners LP owns floating storage and regasification units and liquefied natural gas carriers. For more information, get Portfolio Grader’s complete analysis of GMLP stock.

Cenovus Energy Inc. (CVE) is having a tough week. The company’s rating falls from a C to a D. Cenovus Energy Inc. operates in oil projects and in the production of natural gas and crude oil. The company also gets F’s in sales growth, earnings revisions, and return on equity. For more information, get Portfolio Grader’s complete analysis of CVE stock.

Teekay LNG Partners L.P. (TGP) gets weaker ratings this week as last week’s D drops to a F. Teekay LNG Partners L.P. provides marine transportation services for liquefied natural gas, liquefied petroleum gas and crude oil. The company also gets F’s in earnings growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of TGP stock.

Earthstone Energy, Inc. (ESTE) earns a F this week, moving down from last week’s grade of D. Earthstone Energy, Inc. is an independent oil and gas exploration and production company, primarily engages in the exploration, development, and production of oil and natural gas properties in the United States. The company also gets F’s in earnings revisions and return on equity. For more information, get Portfolio Grader’s complete analysis of ESTE stock.

This week, Contango Oil & Gas Company’s (MCF) rating worsens to a D from the company’s C rating a week ago. Contango Oil & Gas Company explores, develops, produces, and acquires natural gas and oil properties. The company also gets F’s in sales growth, earnings growth, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of MCF stock.

This week, GasLog Ltd. (GLOG) drops from a D to a F rating. GasLog Ltd. operates and manages liquefied natural gas (LNG) carriers. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of GLOG stock.

This is a rough week for Laredo Petroleum, Inc. (LPI). The company’s rating falls to D from the previous week’s C. Laredo Petroleum, Inc. is an independent energy company which engages in exploration, development and acquisition of oil and natural gas properties in the Permian and Mid-Continent regions of the United States. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of LPI stock.

Aegean Marine Petroleum Network Inc. (ANW) slips from a D to a F this week. Aegean Marine Petroleum Network Inc. is a marine fuel logistics company engaged in supplying and marketing refined marine fuel and lubricants to ships in port and at sea. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of ANW stock.

Slipping from a C to a D rating, Tsakos Energy Navigation Limited (TNP) takes a hit this week. Tsakos Energy Navigation Limited provides international seaborne crude oil and petroleum product transportation services. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of TNP stock.

Sanchez Energy Corporation’s (SN) rating weakens this week, dropping to a D versus last week’s C. Sanchez Energy Corporation is an independent exploration and production company focused on the exploration, acquisition and development of unconventional oil and natural gas resources. The company also gets F’s in sales growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of SN stock.

Clean Energy Fuels Corp. (CLNE) experiences a ratings drop this week, going from last week’s C to a D. Clean Energy Fuels Corp. sells natural gas fueling solutions to its customers mainly in the United States and Canada. The company also gets F’s in earnings growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CLNE stock.

Erin Energy Corporation (ERN) slips from a C to a D this week. The company also gets F’s in earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of ERN stock.

This week, Amyris, Inc.’s (AMRS) rating worsens to a F from the company’s D rating a week ago. Amyris, Inc. provides alternatives to a range of petroleum-sourced products used in specialty chemical and transportation fuel markets worldwide. The company also gets F’s in sales growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of AMRS stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.