This week, 9 Oil Gas & Consumable Fuels stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Phillips 66 (PSX) is seeing ratings go up from a C last week to a B this week. Phillips 66 operates as an independent downstream energy company. The company also gets A’s in operating margin growth, earnings revisions, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of PSX stock.

This is a strong week for Valero Energy Corporation (VLO). The company’s rating climbs to A from the previous week’s B. Valero Energy Corporation is an independent petroleum refiner and marketer. The company also gets A’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 VLO stock.

Marathon Petroleum Corporation (MPC) shows solid improvement this week. The company’s rating rises from a C to a B. Marathon Petroleum Corporation is a supplier of gasoline and distillates to resellers and consumers. The company also gets A’s in operating margin growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of MPC stock.

HollyFrontier Corporation (HFC) gets a higher grade this week, advancing from a C last week to a B. HollyFrontier Corporation refines, transports, stores and markets petroleum products. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of HFC stock.

Holly Energy Partners, L.P. (HEP) boosts its rating from a C to a B this week. Holly Energy Partners, L.P. operates a system of refined product pipelines and distribution terminals primarily in West Texas, New Mexico, Utah, and Arizona. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of HEP stock.

Sprague Resources LP (SRLP) improves from a C to a B rating this week. The company also gets A’s in operating margin growth and return on equity. For more information, get Portfolio Grader’s complete analysis of SRLP stock.

Alon USA Energy, Inc. (ALJ) earns a B this week, jumping up from last week’s grade of C. Alon USA Energy, Inc. is an independent refiner and marketer of petroleum products operating mainly in the South Central, Southwestern and Western regions of the United States. The company also gets A’s in earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of ALJ stock.

The rating of Transportadora de Gas del Sur SA Sponsored ADR Class B RegS (TGS) moves up this week, rising from a B to a A. Transportadora de Gas del Sur SA Sponsored ADR Class B RegS transports and processes natural gas in Argentina. The company also gets A’s in operating margin growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of TGS stock.

Torchlight Energy Resources, Inc.’s (TRCH) ratings are looking better this week, moving up to a B from last week’s C. For more information, get Portfolio Grader’s complete analysis of TRCH 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.