3 Oil Gas & Consumable Fuels stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Marathon Petroleum Corporation (MPC) gets a higher grade this week, advancing from a C last week 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.

The rating of Newfield Exploration Company (NFX) moves up this week, rising from a C to a B. Newfield Exploration Company is an independent crude oil and natural gas exploration and production company. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of NFX stock.

Callon Petroleum Company (CPE) is seeing ratings go up from a C last week to a B this week. Callon Petroleum Company engages in the acquisition, exploration, development, and production of crude oil and natural gas properties. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of CPE 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.