4 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”).

Holly Energy Partners, L.P. (HEP) gets a higher grade this week, advancing from a B last week to a A. 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 earnings growth and return on equity. For more information, get Portfolio Grader’s complete analysis of HEP stock.

Rice Midstream Partners LP (RMP) earns a B this week, jumping up from last week’s grade of C. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of RMP stock.

Callon Petroleum Company (CPE) shows solid improvement this week. The company’s rating rises from a C to a B. 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 surprise. For more information, get Portfolio Grader’s complete analysis of CPE stock.

Zion Oil and Gas, Inc. (ZN) boosts its rating from a C to a B this week. Zion Oil and Gas, Inc. operates as a development stage oil and gas exploration company in Israel. For more information, get Portfolio Grader’s complete analysis of ZN 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.