This week, the ratings of 14 Oil Gas & Consumable Fuels stocks on Portfolio Grader are down. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Phillips 66 Partners LP (PSXP) gets weaker ratings this week as last week’s C drops to a D. The company also gets F’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of PSXP stock.

Western Gas Partners, LP’s (WES) rating weakens this week, dropping to a D versus last week’s C. Western Gas Partners, LP operates, acquires, and develops midstream energy assets in east, west, and south Texas; the Rocky Mountains; and the Mid-Continent. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of WES stock.

Sunoco LP (SUN) experiences a ratings drop this week, going from last week’s C to a D. Sunoco LP is a petroleum refiner and marketer, as well as a manufacturer of chemicals. The company also gets F’s in sales growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of SUN stock.

SM Energy Company (SM) slips from a C to a D this week. SM Energy Company is an independent energy company that explores, exploits, develops, acquires and produces natural gas and crude oil in the United States. The company also gets F’s in sales growth, operating margin growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of SM stock.

This week, Sunoco Logistics Partners L.P. (SXL) drops from a C to a D rating. Sunoco Logistics Partners L.P. is engaged in the business of transporting and storing refined products and crude oil, as well as the purchase and sale of crude oil. The company also gets F’s in sales growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of SXL stock.

Plains All American Pipeline, L.P. (PAA) declines this week from a D to a F. Plains All American Pipeline, L.P. is involved in interstate and intrastate crude oil pipeline transportation and crude oil terminalling storage activities. The company also gets F’s in sales growth, earnings growth, and free cash flow. For more information, get Portfolio Grader’s complete analysis of PAA stock.

This week, Williams Companies, Inc.’s (WMB) rating worsens to a F from the company’s D rating a week ago. Williams Companies, Inc. is engaged in finding, producing, gathering, processing and transporting natural gas. The company also gets F’s in operating margin growth, earnings growth, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of WMB stock.

Slipping from a C to a D rating, Cheniere Energy Partners LP Holdings, LLC (CQH) takes a hit this week. For more information, get Portfolio Grader’s complete analysis of CQH stock.

CVR Refining LP (CVRR) is having a tough week. The company’s rating falls from a D to a F. The company also gets F’s in sales growth, earnings growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CVRR stock.

Plains GP Holdings LP Class A (PAGP) earns a F this week, moving down from last week’s grade of D. The company also gets F’s in sales growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of PAGP stock.

This is a rough week for Aegean Marine Petroleum Network Inc. (ANW). The company’s rating falls to F from the previous week’s D. 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.

Petroleo Brasileiro SA Sponsored ADR (PBR) gets weaker ratings this week as last week’s C drops to a D. Petroleo Brasileiro SA Sponsored ADR explores for and produces oil and natural gas. The company also gets F’s in sales growth, earnings growth, earnings revisions, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of PBR stock.

TOP Ships Inc. (TOPS) declines this week from a D to a F. TOP Ships Inc. offers marine shipping services. The company also gets F’s in operating margin growth, earnings growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of TOPS stock.

Southcross Energy Partners, L.P.’s (SXE) rating weakens this week, dropping to a D versus last week’s C. The company also gets F’s in sales growth, earnings revisions, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of SXE 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.