This week, the overall grades of 4 Oil Gas & Consumable Fuels stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Ship Finance International Limited (SFL) declines this week from a C to a D. Ship Finance International Limited is engaged mainly in the ownership and operation of vessels and offshore-related assets. The company also gets F’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of SFL stock.

Slipping from a C to a D rating, Mesa Royalty Trust (MTR) takes a hit this week. Mesa Royalty Trust holds royalty interests in oil and gas properties in the United States. The company also gets F’s in sales growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of MTR stock.

Teekay Offshore Partners L.P. (TOO) slips from a D to a F this week. Teekay Offshore Partners L.P. provides marine transportation and storage services to the offshore oil industry. The company also gets F’s in 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 TOO stock.

This is a rough week for GeoPark Ltd (GPRK). The company’s rating falls to D from the previous week’s C. The company also gets F’s in sales growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of GPRK 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.